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5x+2=9-7x
We move all terms to the left:
5x+2-(9-7x)=0
We add all the numbers together, and all the variables
5x-(-7x+9)+2=0
We get rid of parentheses
5x+7x-9+2=0
We add all the numbers together, and all the variables
12x-7=0
We move all terms containing x to the left, all other terms to the right
12x=7
x=7/12
x=7/12
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