3a-5=7a-45

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Solution for 3a-5=7a-45 equation: 



3a-5=7a-45

We move all terms to the left:

3a-5-(7a-45)=0

We get rid of parentheses

3a-7a+45-5=0

We add all the numbers together, and all the variables

-4a+40=0

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

-4a=-40

a=-40/-4

a=+10

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