-2(a+5)-10=-2(9+10

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Solution for -2(a+5)-10=-2(9+10 equation: 



-2(a+5)-10=-2(9+10

We move all terms to the left:

-2(a+5)-10-(-2(9+10)=0

We add all the numbers together, and all the variables

-2(a+5)-10-(-219=0

We add all the numbers together, and all the variables

-2(a+5)=0

We multiply parentheses

-2a-10=0

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

-2a=10

a=10/-2

a=-5

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