3a+7=64

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Solution for 3a+7=64 equation: 



3a+7=64

We move all terms to the left:

3a+7-(64)=0

We add all the numbers together, and all the variables

3a-57=0

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

3a=57

a=57/3

a=19

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