8a-3a=+55-40

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Solution for 8a-3a=+55-40 equation: 



8a-3a=+55-40

We move all terms to the left:

8a-3a-(+55-40)=0

We add all the numbers together, and all the variables

8a-3a-15=0

We add all the numbers together, and all the variables

5a-15=0

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

5a=15

a=15/5

a=3

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