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(2x+9)(2)+(x-5)(2)=50
We move all terms to the left:
(2x+9)(2)+(x-5)(2)-(50)=0
We multiply parentheses
4x+2x+18-10-50=0
We add all the numbers together, and all the variables
6x-42=0
We move all terms containing x to the left, all other terms to the right
6x=42
x=42/6
x=7
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