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+156x-5x=15+6x=210.2(3-x)=0.4(6-x) (3-x)=2(6-x) 3-x=12-2x2x-x=12-3x=9

6(x-1)=5(x+3)和0.2(3-x)=0.4(6-x) 这两道题用方程
6(x-1)=5(x+3)
x=6+15=21

0.2(3-x)=0.4(6-x)
0.6-2.4=-0.2x
x=9

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

6(x-1)=5(x+3)
6X-6=5X+15
6X-5X=15+6X=21
0.2(3-x)=0.4(6-x)
0.6-0.2X =2.4-0.4X
0.4X-0.2X=2.4-0.6
0.2X =1.8
X=9