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4x-9x+7=x-5+12
We move all terms to the left:
4x-9x+7-(x-5+12)=0
We add all the numbers together, and all the variables
4x-9x-(x+7)+7=0
We add all the numbers together, and all the variables
-5x-(x+7)+7=0
We get rid of parentheses
-5x-x-7+7=0
We add all the numbers together, and all the variables
-6x=0
x=0/-6
x=0
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