42=14-7a

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Solution for 42=14-7a equation: 



42=14-7a

We move all terms to the left:

42-(14-7a)=0

We add all the numbers together, and all the variables

-(-7a+14)+42=0

We get rid of parentheses

7a-14+42=0

We add all the numbers together, and all the variables

7a+28=0

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

7a=-28

a=-28/7

a=-4

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