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(12x+13)-(5x)=150
We move all terms to the left:
(12x+13)-(5x)-(150)=0
We add all the numbers together, and all the variables
-5x+(12x+13)-150=0
We get rid of parentheses
-5x+12x+13-150=0
We add all the numbers together, and all the variables
7x-137=0
We move all terms containing x to the left, all other terms to the right
7x=137
x=137/7
x=19+4/7
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