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(8x+20)+(11x-31)=1803
We move all terms to the left:
(8x+20)+(11x-31)-(1803)=0
We get rid of parentheses
8x+11x+20-31-1803=0
We add all the numbers together, and all the variables
19x-1814=0
We move all terms containing x to the left, all other terms to the right
19x=1814
x=1814/19
x=95+9/19
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