225-3a-a=25

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Solution for 225-3a-a=25 equation: 



225-3a-a=25

We move all terms to the left:

225-3a-a-(25)=0

We add all the numbers together, and all the variables

-4a+200=0

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

-4a=-200

a=-200/-4

a=+50

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