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-7=4x+7+5x
We move all terms to the left:
-7-(4x+7+5x)=0
We add all the numbers together, and all the variables
-(9x+7)-7=0
We get rid of parentheses
-9x-7-7=0
We add all the numbers together, and all the variables
-9x-14=0
We move all terms containing x to the left, all other terms to the right
-9x=14
x=14/-9
x=-1+5/9
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