1.2X=X+20 移项,得1.2X-X=20 合并同类项,得0.2X=20 系数化为1,得X=10 很高兴能够帮助你
1.2X=X+20
1.2x-x=20
0.2x=20
x=20÷0.2
x=100
12x=10X+200,12x-10x=200,2x-200,x=100
1.2x-x=20
0.2x=20
x=100
1.2x = x+20
移项1.2x-x=20
(1.2-1)x=20
0.2x=20
x=20除以0.2
x=100