7a-2a=75

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Solution for 7a-2a=75 equation: 



7a-2a=75

We move all terms to the left:

7a-2a-(75)=0

We add all the numbers together, and all the variables

5a-75=0

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

5a=75

a=75/5

a=15

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