Question

520×80%－X=4%X怎么算,求一步步解答…

Answer 1

520 × 80% - x = 4% x

520 × 0.8 = 4% x + x

52 × 8 = 1.04 x

1.04 x = 416

两边乘以 100 得：

104 x = 41600

x = 400