X+8=2.20+12 - x=44
3X+X=120 - x=30
60X+850=1870 - x=17
3X-X=94.3 - x=141
55X=50(X-7)+510 - x=32
5X-12=3 - x=3
3X+1=X-3 - x=-2
5=3T+7 - t=1
3(2X+1)=-9 - x=-2