3-7a=7-9a

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Solution for 3-7a=7-9a equation: 



3-7a=7-9a

We move all terms to the left:

3-7a-(7-9a)=0

We add all the numbers together, and all the variables

-7a-(-9a+7)+3=0

We get rid of parentheses

-7a+9a-7+3=0

We add all the numbers together, and all the variables

2a-4=0

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

2a=4

a=4/2

a=2

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