-25=-2a-1

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Solution for -25=-2a-1 equation: 



-25=-2a-1

We move all terms to the left:

-25-(-2a-1)=0

We get rid of parentheses

2a+1-25=0

We add all the numbers together, and all the variables

2a-24=0

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

2a=24

a=24/2

a=12

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