21x+4=81+10x

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Solution for 21x+4=81+10x equation: 



21x+4=81+10x

We move all terms to the left:

21x+4-(81+10x)=0

We add all the numbers together, and all the variables

21x-(10x+81)+4=0

We get rid of parentheses

21x-10x-81+4=0

We add all the numbers together, and all the variables

11x-77=0

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

11x=77

x=77/11

x=7

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