5a-15=2(a+1)+21a+2

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Solution for 5a-15=2(a+1)+21a+2 equation: 



5a-15=2(a+1)+21a+2

We move all terms to the left:

5a-15-(2(a+1)+21a+2)=0



We calculate terms in parentheses: -(2(a+1)+21a+2), so:

2(a+1)+21a+2

We add all the numbers together, and all the variables

21a+2(a+1)+2

We multiply parentheses

21a+2a+2+2

We add all the numbers together, and all the variables

23a+4

Back to the equation:

-(23a+4)



We get rid of parentheses

5a-23a-4-15=0

We add all the numbers together, and all the variables

-18a-19=0

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

-18a=19

a=19/-18

a=-1+1/18

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