2份之1x-1=5份之2x-3

问题描述:

2份之1x-1=5份之2x-3

1/2x - 1 = 2/5x - 3
1/2x - 2/5x = -3 + 1
1/10x = -2
x = -2 ÷ 1/10
x = -20