-5(9+a)=-10

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Solution for -5(9+a)=-10 equation: 



-5(9+a)=-10

We move all terms to the left:

-5(9+a)-(-10)=0

We add all the numbers together, and all the variables

-5(a+9)-(-10)=0

We add all the numbers together, and all the variables

-5(a+9)+10=0

We multiply parentheses

-5a-45+10=0

We add all the numbers together, and all the variables

-5a-35=0

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

-5a=35

a=35/-5

a=-7

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