15a+5=20a-20

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Solution for 15a+5=20a-20 equation: 



15a+5=20a-20

We move all terms to the left:

15a+5-(20a-20)=0

We get rid of parentheses

15a-20a+20+5=0

We add all the numbers together, and all the variables

-5a+25=0

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

-5a=-25

a=-25/-5

a=+5

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