31+(-3x)=10

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Solution for 31+(-3x)=10 equation: 



31+(-3x)=10

We move all terms to the left:

31+(-3x)-(10)=0

We add all the numbers together, and all the variables

(-3x)+21=0

We get rid of parentheses

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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