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2x+2(1/2x+2)=40
We move all terms to the left:
2x+2(1/2x+2)-(40)=0
Domain of the equation: 2x+2)!=0We multiply parentheses
x∈R
2x+2x+4-40=0
We add all the numbers together, and all the variables
4x-36=0
We move all terms containing x to the left, all other terms to the right
4x=36
x=36/4
x=9
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