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7+4x+8-3x=2x+1
We move all terms to the left:
7+4x+8-3x-(2x+1)=0
We add all the numbers together, and all the variables
x-(2x+1)+15=0
We get rid of parentheses
x-2x-1+15=0
We add all the numbers together, and all the variables
-1x+14=0
We move all terms containing x to the left, all other terms to the right
-x=-14
x=-14/-1
x=+14
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