8+(-a)=25

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Solution for 8+(-a)=25 equation: 



8+(-a)=25

We move all terms to the left:

8+(-a)-(25)=0

We add all the numbers together, and all the variables

(-1a)+8-25=0

We add all the numbers together, and all the variables

(-1a)-17=0

We get rid of parentheses

-1a-17=0

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

-a=17

a=17/-1

a=-17

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