4x+15=81-x

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Solution for 4x+15=81-x equation: 



4x+15=81-x

We move all terms to the left:

4x+15-(81-x)=0

We add all the numbers together, and all the variables

4x-(-1x+81)+15=0

We get rid of parentheses

4x+1x-81+15=0

We add all the numbers together, and all the variables

5x-66=0

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

5x=66

x=66/5

x=13+1/5

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