4.7×12-10x=18x
28x=56.4
x=2.01
5.7（2x-6）=8
11.4x-34.2=8
11.4x=42.2
x=3.70
6.3（6x-7）=15x+12
37.8x-44.1=15x+12
22.8x=56.1
x=2.46