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3-7x=4+2x
We move all terms to the left:
3-7x-(4+2x)=0
We add all the numbers together, and all the variables
-7x-(2x+4)+3=0
We get rid of parentheses
-7x-2x-4+3=0
We add all the numbers together, and all the variables
-9x-1=0
We move all terms containing x to the left, all other terms to the right
-9x=1
x=1/-9
x=-1/9
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