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2(8x+20)=11x-31
We move all terms to the left:
2(8x+20)-(11x-31)=0
We multiply parentheses
16x-(11x-31)+40=0
We get rid of parentheses
16x-11x+31+40=0
We add all the numbers together, and all the variables
5x+71=0
We move all terms containing x to the left, all other terms to the right
5x=-71
x=-71/5
x=-14+1/5
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