解方程:
1.8*1.2x-13.5=1.8x+13.5
2.16x-13.5=1.8x+13.5
2.16x-1.8x-13.5=13.5
0.36x-13.5=13.5
0.36x=13.5+13.5
0.36x=27
x=75
1.8×1.2x-13.5=1.8x+13.5
解:2.12x-13.5=1.8x+13.5
2.12x-1.8x=13.5+13.5
0.36x=27
0.36x÷0.36=27÷0.36
x=75
解:
1.8*1.2x-13.5=1.8x+13.5
1.8*1.2x-1.8x=13.5+13.5
1.8(1.2x-x)=27
1.8*0.2x=27
0.36x=27
x=27/0.36
x=75