4-2a=7

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Solution for 4-2a=7 equation: 



4-2a=7

We move all terms to the left:

4-2a-(7)=0

We add all the numbers together, and all the variables

-2a-3=0

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

-2a=3

a=3/-2

a=-1+1/2

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