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4+x=7
x+6=9
4+x=7+5
4+x-2=7
x-6=9
17-x=9
x-6=9+3
9+3=17-x
16+2x =24+x
4x=16
15=3x
4x+2=18
24-x =15+2x
2+5x=18+3x
6x-2=3x+10
3(x+6) =2+5x
2(2x-1)=3x+10
30-4(x-5)=2x-16
2(x+4) -3=2+5x
100-3(2x-1)=3-4x
30+4(x-5)=2x-26
20x-50=50
28+6 x =88
32-22 x =10