21a+28=11a-11+19

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Solution for 21a+28=11a-11+19 equation: 



21a+28=11a-11+19

We move all terms to the left:

21a+28-(11a-11+19)=0

We add all the numbers together, and all the variables

21a-(11a+8)+28=0

We get rid of parentheses

21a-11a-8+28=0

We add all the numbers together, and all the variables

10a+20=0

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

10a=-20

a=-20/10

a=-2

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