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x*2+9x=36
We move all terms to the left:
x*2+9x-(36)=0
We add all the numbers together, and all the variables
9x+x*2-36=0
Wy multiply elements
9x+2x-36=0
We add all the numbers together, and all the variables
11x-36=0
We move all terms containing x to the left, all other terms to the right
11x=36
x=36/11
x=3+3/11
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