1.7.2x8-10x=36 2.二分之一x+45%=6.45 3.(4-40%)x=7.2

问题描述:

1.7.2x8-10x=36 2.二分之一x+45%=6.45 3.(4-40%)x=7.2
1.7.2x8-10x=36
2.二分之一x+45%=6.45
3.(4-40%)x=7.2
解方程

1.7.2x8-10x=36 57.6-10x=3610x=57.6-3610x=21.6x=21.6/10x=2.162.二分之一x+45%=6.45 0.5x+0.45=6.450.5x=6.45-0.450.5x=6x=6/0.5x=123.(4-40%)x=7.23.6x=7.2x=7.2/3.6x=2