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40(x+3)-20=18
We move all terms to the left:
40(x+3)-20-(18)=0
We add all the numbers together, and all the variables
40(x+3)-38=0
We multiply parentheses
40x+120-38=0
We add all the numbers together, and all the variables
40x+82=0
We move all terms containing x to the left, all other terms to the right
40x=-82
x=-82/40
x=-2+1/20
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