s+40=2s+31

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Solution for s+40=2s+31 equation: 



s+40=2s+31

We move all terms to the left:

s+40-(2s+31)=0

We get rid of parentheses

s-2s-31+40=0

We add all the numbers together, and all the variables

-1s+9=0

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

-s=-9

s=-9/-1

s=+9

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