5x-18+9x-28+7x+15=221

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Solution for 5x-18+9x-28+7x+15=221 equation: 



5x-18+9x-28+7x+15=221

We move all terms to the left:

5x-18+9x-28+7x+15-(221)=0

We add all the numbers together, and all the variables

21x-252=0

We move all terms containing x to the left, all other terms to the right

21x=252

x=252/21

x=12

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