3+12a=75

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Solution for 3+12a=75 equation: 



3+12a=75

We move all terms to the left:

3+12a-(75)=0

We add all the numbers together, and all the variables

12a-72=0

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

12a=72

a=72/12

a=6

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