10+2a=40

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Solution for 10+2a=40 equation: 



10+2a=40

We move all terms to the left:

10+2a-(40)=0

We add all the numbers together, and all the variables

2a-30=0

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

2a=30

a=30/2

a=15

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