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7-10x+14=2x+21-12x
We move all terms to the left:
7-10x+14-(2x+21-12x)=0
We add all the numbers together, and all the variables
-10x-(-10x+21)+7+14=0
We add all the numbers together, and all the variables
-10x-(-10x+21)+21=0
We get rid of parentheses
-10x+10x-21+21=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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