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x=-6
2.2x=6
x=3
3.15-3=x+x
12=2x
x=6
4.23+1=3x
24=3x
x=8
3x-2x = 3-9
x = -6
2. 2x + 3 = 9
2x = 9-3
2x = 6
x=3
3. 15-x = x+3
15-3 = x + x
2x = 12
x = 6
4. 23 = 3x-1
23+1 = 3x
3x = 24
x= 8
5. 3(x+3)≤ 2 (6 - x)
3x+9≤ 12-2x
3x+2x≤ 12-9
5x≤ 3
x ≤ 3/5