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x=-4
2. 6x+7x=-14+1
13x=-13
x=-1
3.4x-3x=5+3
x=8
4.5x+3x=7-2
8x=5
x=5/8
5.3x-3=0
3x=3
x=1
6.-6x-6=24
-6x=24+6
-6x=30
x=-5
7.-7x+14+3x-1=0
-7x+3x=1-14
-4x=-13
x=13/4
x=3 1/4
8.4x-4=6x+6
4x-6x=6+4
-2x=10
x=-5
9.2x-1-3x-3=-8
2x-3x=-8+3+1
-x=-4
x=4
11.-3x+6-5=3x+15+4
-3x-3x=15+4+5-6
-6x=18
x=-3
12.-4-x=6x-2
-x-6x=-2+4
-7x=2
x=-2/7
13.3x+18-x+3x+5=3
3x-x+3x=3-5-18
5x=-20
x=-4
14.x-7-6x-10=3
x-6x=3+10+7
-5x=20
x=-4
15.2x-3x-1=6
-x=6+1
x=-7