x-3.6/4=x+4.8/82(x-3.6)=x+4.82x-7.2=x+4.82x-x=4.8+7.2x=12
x-3.6/4=x+4.8/8(x-3.6)×8=（x+4.8)x48x-28.8=4x+19.24x=48x=12
xz v v th th th
