3a-5=7a+3.

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Solution for 3a-5=7a+3. equation: 



3a-5=7a+3.

We move all terms to the left:

3a-5-(7a+3.)=0

We add all the numbers together, and all the variables

3a-(7a+3)-5=0

We get rid of parentheses

3a-7a-3-5=0

We add all the numbers together, and all the variables

-4a-8=0

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

-4a=8

a=8/-4

a=-2

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