6(x-1)=5(x+3)和0.2(3-x)=0.4(6-x)

问题描述:

6(x-1)=5(x+3)和0.2(3-x)=0.4(6-x)

6(x-1)=5(x+3)
6x-6=5x+15
6x-5x=15+6
x=21
0.2(3-x)=0.4(6-x)
3-x=2(6-x)
3-x=12-2x
2x-x=12-3
x=9