Tìm x: a) <span class="MathJax_Preview" style="color: inherit;"><span class="MJXp-math" id="MJXp-Span-1"><span class="MJXp-mn" id="MJXp-Span-2">750</span><span class="MJXp-mo" id="MJXp-Span-3" style="margin-left: 0.267em; margin-right: 0.267em;">−</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-4">x</span><span class="MJXp-mo" id="MJXp-Span-5" style="margin-left: 0.267em; margin-right: 0.267em;">×</span><span class="MJXp-mn" id="MJXp-Span-6">5</span><span class="MJXp-mo" id="MJXp-Span-7" style="margin-left: 0.333em; margin-right: 0.333em;">=</span><span class="MJXp-mn" id="MJXp-Span-8">540</span></span></span><script type="math/tex" id="MathJax-Element-1">750 - x\times5=540</script> b) <span class="MathJax_Preview" style="color: inherit;"><span class="MJXp-math" id="MJXp-Span-9"><span class="MJXp-mi MJXp-italic" id="MJXp-Span-10">x</span><span class="MJXp-mo" id="MJXp-Span-11" style="margin-left: 0.267em; margin-right: 0.267em;">+</span><span class="MJXp-mn" id="MJXp-Span-12">175</span><span class="MJXp-mo" id="MJXp-Span-13" style="margin-left: 0.267em; margin-right: 0.267em;">+</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-14">x</span><span class="MJXp-mo" id="MJXp-Span-15" style="margin-left: 0.333em; margin-right: 0.333em;">=</span><span class="MJXp-mn" id="MJXp-Span-16">225</span></span></span><script type="math/tex" id="MathJax-Element-2">x+ 175 +x =225</script> a) Đáp án: b) ĐTìm x: a) 750−x×5=540 b) x+175+x=225 a) Đáp án: b) Đ
4.5/5
Tác giả: Thầy Tùng
Đăng ngày: 18 Aug 2022
Câu hỏi:
Tìm x:
a) 750−x×5=540
b) x+175+x=225
Đáp án án đúng là: A
Lời giải chi tiết:
Hướng dẫn:
a) 750−x×5=540
x=(750−540):5
x=42
Vậy x = 42.
b) x+175+x=225
x×2=225−175
x=50:2
x=25
Vậy x = 25.
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