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-13=7x+1-4x
We move all terms to the left:
-13-(7x+1-4x)=0
We add all the numbers together, and all the variables
-(3x+1)-13=0
We get rid of parentheses
-3x-1-13=0
We add all the numbers together, and all the variables
-3x-14=0
We move all terms containing x to the left, all other terms to the right
-3x=14
x=14/-3
x=-4+2/3
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