7-3a=25

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Solution for 7-3a=25 equation: 



7-3a=25

We move all terms to the left:

7-3a-(25)=0

We add all the numbers together, and all the variables

-3a-18=0

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

-3a=18

a=18/-3

a=-6

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