3+10x=x+21

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Solution for 3+10x=x+21 equation:



3+10x=x+21
We move all terms to the left:
3+10x-(x+21)=0
We get rid of parentheses
10x-x-21+3=0
We add all the numbers together, and all the variables
9x-18=0
We move all terms containing x to the left, all other terms to the right
9x=18
x=18/9
x=2

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