31=-7x-18

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Solution for 31=-7x-18 equation: 



31=-7x-18

We move all terms to the left:

31-(-7x-18)=0

We get rid of parentheses

7x+18+31=0

We add all the numbers together, and all the variables

7x+49=0

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

7x=-49

x=-49/7

x=-7

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