-10(-9+a)=-30=

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Solution for -10(-9+a)=-30= equation: 



-10(-9+a)=-30=

We move all terms to the left:

-10(-9+a)-(-30)=0

We add all the numbers together, and all the variables

-10(a-9)-(-30)=0

We add all the numbers together, and all the variables

-10(a-9)+30=0

We multiply parentheses

-10a+90+30=0

We add all the numbers together, and all the variables

-10a+120=0

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

-10a=-120

a=-120/-10

a=+12

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