9x+27=81
9x=54
x=6
2.5x-12=46
2.5x=58
10x=232
x=23.2
0.5X(7x+28x)=14.7
35x=29.4
x=0.84
(4x-4.8)÷4=124
x-1.2=124
x=124+1.2
x=125.2
42.2X2-5.8x=32.2
5.8x=84.4-32.2
5.8x=52.2
x=9