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6x+2(x+5)=40
We move all terms to the left:
6x+2(x+5)-(40)=0
We multiply parentheses
6x+2x+10-40=0
We add all the numbers together, and all the variables
8x-30=0
We move all terms containing x to the left, all other terms to the right
8x=30
x=30/8
x=3+3/4
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