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9x+15*6x+15=135
We move all terms to the left:
9x+15*6x+15-(135)=0
We add all the numbers together, and all the variables
9x+15*6x-120=0
Wy multiply elements
9x+90x-120=0
We add all the numbers together, and all the variables
99x-120=0
We move all terms containing x to the left, all other terms to the right
99x=120
x=120/99
x=1+7/33
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