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(4x-7)+(3x+4)=1800
We move all terms to the left:
(4x-7)+(3x+4)-(1800)=0
We get rid of parentheses
4x+3x-7+4-1800=0
We add all the numbers together, and all the variables
7x-1803=0
We move all terms containing x to the left, all other terms to the right
7x=1803
x=1803/7
x=257+4/7
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