(15+4a)-20=2a+5

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Solution for (15+4a)-20=2a+5 equation: 



(15+4a)-20=2a+5

We move all terms to the left:

(15+4a)-20-(2a+5)=0

We add all the numbers together, and all the variables

(4a+15)-(2a+5)-20=0

We get rid of parentheses

4a-2a+15-5-20=0

We add all the numbers together, and all the variables

2a-10=0

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

2a=10

a=10/2

a=5

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