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45x-7+2x=4x+5
We move all terms to the left:
45x-7+2x-(4x+5)=0
We add all the numbers together, and all the variables
47x-(4x+5)-7=0
We get rid of parentheses
47x-4x-5-7=0
We add all the numbers together, and all the variables
43x-12=0
We move all terms containing x to the left, all other terms to the right
43x=12
x=12/43
x=12/43
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