Question

解方程：7.9 – 0.4 x =4.3 x -0.85 x =75 ( 9 – x) ÷0.5 = 10

Answer 1

7.9 – 0.4 x =4.3 解-0.4x=4.3-7.9 -0.4x=-3.6 x=9

x -0.85 x =75 解0.15x=75 x=500

( 9 – x) ÷0.5 = 10 解9-x=5 x=4