15a+3-2a=42

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Solution for 15a+3-2a=42 equation:



15a+3-2a=42
We move all terms to the left:
15a+3-2a-(42)=0
We add all the numbers together, and all the variables
13a-39=0
We move all terms containing a to the left, all other terms to the right
13a=39
a=39/13
a=3

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