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7(x+9)=9x=5
We move all terms to the left:
7(x+9)-(9x)=0
We add all the numbers together, and all the variables
-9x+7(x+9)=0
We multiply parentheses
-9x+7x+63=0
We add all the numbers together, and all the variables
-2x+63=0
We move all terms containing x to the left, all other terms to the right
-2x=-63
x=-63/-2
x=31+1/2
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