3a-7=120

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Solution for 3a-7=120 equation: 



3a-7=120

We move all terms to the left:

3a-7-(120)=0

We add all the numbers together, and all the variables

3a-127=0

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

3a=127

a=127/3

a=42+1/3

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