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(5x+23)+(8x-49)=20
We move all terms to the left:
(5x+23)+(8x-49)-(20)=0
We get rid of parentheses
5x+8x+23-49-20=0
We add all the numbers together, and all the variables
13x-46=0
We move all terms containing x to the left, all other terms to the right
13x=46
x=46/13
x=3+7/13
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