0.3(x+15)—5=0.2x

问题描述:

0.3(x+15)—5=0.2x

0.3(x+15)—5=0.2x
0.3X+4.5-5=0.2X
0.1X=0.5
X=5


0.3(x+15)—5=0.2x
0.3X+4.5-5=0.2X
0.1X=0.5
X=5

x=-5

0.3x+4.5-5=0.2x
-0.5=-0.1x
x=5

0.3(x+15)-5=0.2x
0.3x+15*0.3-5=0.2x
0.3x+4.5-5=0.2x
0.3x-0.2x+4.5=5
0.1x+4.5=5
0.1x=5-4.5
0.1x=0.5
x=5