2份之1x-1＝5份之2x-3
问题描述：
2份之1x-1＝5份之2x-3
答
2份之1x-1＝5份之2x-3
o.5x-1=0.4x-3
0.5x-0.4x=1-3
0.1x=-2
x=-20
答
2分之1x-5分之2x=-3+1
10分之5x-10分之4x=-2
10分之x=-2
x=-20
答
1/2x - 1 = 2/5x - 3
1/2x - 2/5x = -3 + 1
1/10x = -2
x = -2 ÷ 1/10
x = -20