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43=7x+3x+3
We move all terms to the left:
43-(7x+3x+3)=0
We add all the numbers together, and all the variables
-(10x+3)+43=0
We get rid of parentheses
-10x-3+43=0
We add all the numbers together, and all the variables
-10x+40=0
We move all terms containing x to the left, all other terms to the right
-10x=-40
x=-40/-10
x=+4
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