42=2a+1

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Solution for 42=2a+1 equation: 



42=2a+1

We move all terms to the left:

42-(2a+1)=0

We get rid of parentheses

-2a-1+42=0

We add all the numbers together, and all the variables

-2a+41=0

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

-2a=-41

a=-41/-2

a=20+1/2

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