X-20=7n+10

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Solution for X-20=7n+10 equation: 



X-20=7X+10

We move all terms to the left:

X-20-(7X+10)=0

We get rid of parentheses

X-7X-10-20=0

We add all the numbers together, and all the variables

-6X-30=0

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

-6X=30

X=30/-6

X=-5

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