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2x=4
x=2
2. 3(2x+3)=4x+6
6x+9=4x+6
2x=-3
3. 12x-3=x+5
10x=8
x=8/10
4.6x+12+3x=2x-2-2
9x+12=2x-4
7x=-16
x=-16/7
5.2x=14
x=7
6. 5-x/4 - 5+x/5=1-x/4 +2
(5-x)(/4-(5+x)/5=(1-x)/4 +1
25-x-20+4x=(1-x+4)/4
5-x=(-x+5)
20-4x=5-x
15=3x
5=x