81=x+9

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Solution for 81=x+9 equation:



81=x+9
We move all terms to the left:
81-(x+9)=0
We get rid of parentheses
-x-9+81=0
We add all the numbers together, and all the variables
-1x+72=0
We move all terms containing x to the left, all other terms to the right
-x=-72
x=-72/-1
x=+72

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