Tìm x, biết: a) x + 37 = 73 – 5 b) 5 7 = x + 19 a) $\large x =$ b) $\l

a) x + 37 = 73 – 5

    x + 37 = 68

            x = 68 – 37

            x = 31

b) 5  7 = x + 19

         35 = x + 19

           x = 35 – 19

           x = 16