7=3-4*7a

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Solution for 7=3-4*7a equation: 



7=3-4*7a

We move all terms to the left:

7-(3-4*7a)=0

We add all the numbers together, and all the variables

-(-4*7a+3)+7=0

We get rid of parentheses

4*7a-3+7=0

We add all the numbers together, and all the variables

4*7a+4=0

Wy multiply elements

28a+4=0

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

28a=-4

a=-4/28

a=-1/7

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