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-4+5x=18+3
We move all terms to the left:
-4+5x-(18+3)=0
We add all the numbers together, and all the variables
5x-4-21=0
We add all the numbers together, and all the variables
5x-25=0
We move all terms containing x to the left, all other terms to the right
5x=25
x=25/5
x=5
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