Question

（28+x）：（4+x）=19：7 解方程

Answer 1

(28 + x)：(4 + x) = 19：7

7(28 + x) = 19(4 + x)

196 + 7x = 76 + 19x

19x - 7x = 196 - 76

12x = 120

x = 120 ÷ 12

x = 10