42=10+8a

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Solution for 42=10+8a equation: 



42=10+8a

We move all terms to the left:

42-(10+8a)=0

We add all the numbers together, and all the variables

-(8a+10)+42=0

We get rid of parentheses

-8a-10+42=0

We add all the numbers together, and all the variables

-8a+32=0

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

-8a=-32

a=-32/-8

a=+4

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