1.21-x=2*(16-x) x=32-21=11
2.(x+3)*4=(x-3)*6 2x=12+18=30 x=15
3.8x-180=(50-x)*3 11x=150+180=330 x=33
4.30x+42(60-x)=2136 12x=2520-2136=384 x=32
1.21-x=2*(16-x) x=32-21=11
2.(x+3)*4=(x-3)*6 2x=12+18=30 x=15
3.8x-180=(50-x)*3 11x=150+180=330 x=33
4.30x+42(60-x)=2136 12x=2520-2136=384 x=32