0.3(x+15)—5=0.2x
问题描述:
0.3(x+15)—5=0.2x
答
0.3(x+15)—5=0.2x
0.3X+4.5-5=0.2X
0.1X=0.5
X=5
答
0.3(x+15)—5=0.2x
0.3X+4.5-5=0.2X
0.1X=0.5
X=5
答
x=-5
答
0.3x+4.5-5=0.2x
-0.5=-0.1x
x=5
答
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