15a-75=225

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Solution for 15a-75=225 equation: 



15a-75=225

We move all terms to the left:

15a-75-(225)=0

We add all the numbers together, and all the variables

15a-300=0

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

15a=300

a=300/15

a=20

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