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5(x-3)+2(x-4)=19
We move all terms to the left:
5(x-3)+2(x-4)-(19)=0
We multiply parentheses
5x+2x-15-8-19=0
We add all the numbers together, and all the variables
7x-42=0
We move all terms containing x to the left, all other terms to the right
7x=42
x=42/7
x=6
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