4(a+2)-9(a-1)=-4(2a+9)-16=

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Solution for 4(a+2)-9(a-1)=-4(2a+9)-16= equation: 



4(a+2)-9(a-1)=-4(2a+9)-16=

We move all terms to the left:

4(a+2)-9(a-1)-(-4(2a+9)-16)=0

We multiply parentheses

4a-9a-(-4(2a+9)-16)+8+9=0



We calculate terms in parentheses: -(-4(2a+9)-16), so:

-4(2a+9)-16

We multiply parentheses

-8a-36-16

We add all the numbers together, and all the variables

-8a-52

Back to the equation:

-(-8a-52)



We add all the numbers together, and all the variables

-5a-(-8a-52)+17=0

We get rid of parentheses

-5a+8a+52+17=0

We add all the numbers together, and all the variables

3a+69=0

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

3a=-69

a=-69/3

a=-23

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