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2+2x/2=-18
We move all terms to the left:
2+2x/2-(-18)=0
We add all the numbers together, and all the variables
2x/2+20=0
We multiply all the terms by the denominator
2x+20*2=0
We add all the numbers together, and all the variables
2x+40=0
We move all terms containing x to the left, all other terms to the right
2x=-40
x=-40/2
x=-20
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