Tìm x: <span class="MathJax_Preview" style="color: inherit; display: none;"></span><span id="MathJax-Element-1-Frame" class="mjx-chtml MathJax_CHTML" tabindex="0" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mstyle mathsize="1.44em"><mn>1</mn><mrow class="MJX-TeXAtom-ORD"><mfrac><mn>5</mn><mn>7</mn></mfrac></mrow><mo>×</mo><mi>x</mi><mo>=</mo><mn>2</mn><mrow class="MJX-TeXAtom-ORD"><mfrac><mn>3</mn><mn>6</mn></mfrac></mrow></mstyle></math>" role="presentation" style="font-size: 127%; position: relative;"><span id="MJXc-Node-1" class="mjx-math" aria-hidden="true"><span id="MJXc-Node-2" class="mjx-mrow"><span id="MJXc-Node-3" class="mjx-mstyle"><span id="MJXc-Node-4" class="mjx-mrow" style="font-size: 144%;"><span id="MJXc-Node-5" class="mjx-mn"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">1</span></span><span id="MJXc-Node-6" class="mjx-texatom"><span id="MJXc-Node-7" class="mjx-mrow"><span id="MJXc-Node-8" class="mjx-mfrac"><span class="mjx-box MJXc-stacked" style="width: 0.495em; padding: 0px 0.12em;"><span class="mjx-numerator" style="font-size: 70.7%; width: 0.7em; top: -1.295em;"><span id="MJXc-Node-9" class="mjx-mn" style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">5</span></span></span><span class="mjx-denominator" style="font-size: 70.7%; width: 0.7em; bottom: -0.598em;"><span id="MJXc-Node-10" class="mjx-mn" style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">7</span></span></span><span class="mjx-line" style="border-bottom: 1.8px solid; top: -0.281em; width: 0.495em;"></span></span><span class="mjx-vsize" style="height: 1.338em; vertical-align: -0.423em;"></span></span></span></span><span id="MJXc-Node-11" class="mjx-mo MJXc-space2"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.199em; padding-bottom: 0.347em;">×</span></span><span id="MJXc-Node-12" class="mjx-mi MJXc-space2"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.199em; padding-bottom: 0.298em;">x</span></span><span id="MJXc-Node-13" class="mjx-mo MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.101em; padding-bottom: 0.298em;">=</span></span><span id="MJXc-Node-14" class="mjx-mn MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">2</span></span><span id="MJXc-Node-15" class="mjx-texatom"><span id="MJXc-Node-16" class="mjx-mrow"><span id="MJXc-Node-17" class="mjx-mfrac"><span class="mjx-box MJXc-stacked" style="width: 0.495em; padding: 0px 0.12em;"><span class="mjx-numerator" style="font-size: 70.7%; width: 0.7em; top: -1.294em;"><span id="MJXc-Node-18" class="mjx-mn" style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">3</span></span></span><span class="mjx-denominator" style="font-size: 70.7%; width: 0.7em; bottom: -0.588em;"><span id="MJXc-Node-19" class="mjx-mn" style=""><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.396em; padding-bottom: 0.347em;">6</span></span></span><span class="mjx-line" style="border-bottom: 1.8px solid; top: -0.281em; width: 0.495em;"></span></span><span class="mjx-vsize" style="height: 1.331em; vertical-align: -0.416em;"></span></span></span></span></span></span></span></span><span class="MJX_Assistive_MathML" role="presentation"><math xmlns="http://www.w3.org/1998/Math/MathML"><mstyle mathsize="1.44em"><mn>1</mn><mrow class="MJX-TeXAtom-ORD"><mfrac><mn>5</mn><mn>7</mn></mfrac></mrow><mo>×</mo><mi>x</mi><mo>=</mo><mn>2</mn><mrow class="MJX-TeXAtom-ORD"><mfrac><mn>3</mn><mn>6</mn></mfrac></mrow></mstyle></math></span></span><script type="math/tex" id="MathJax-Element-1">\Large1{5\over7}\times x=2{3\over6}</script> (Viết đáp án dưới dạng

Tìm x: $\Large1{5\over7}\times x=2{3\over6}$ (Viết đáp án dưới dạng

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Tác giả: Thầy Tùng

Đăng ngày: 18 Aug 2022

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Lời giải chi tiết

Câu hỏi:

Tìm x:

$\Large1{5\over7}\times x=2{3\over6}$

(Viết đáp án dưới dạng phân số tối giản a/b).

A. Đáp án: 35/24

Đáp án án đúng là: A

Lời giải chi tiết:

$\Large1{5\over7}\times x=2{3\over6}$

$\Large x=2{3\over6} : 1{5\over7}$

$\Large x={15\over6} : {12\over7}$

$\Large x={15\over6} \times {7\over12}$

$\Large x={35\over24}$

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