-0.5(20a-10)=13

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Solution for -0.5(20a-10)=13 equation: 



-0.5(20a-10)=13

We move all terms to the left:

-0.5(20a-10)-(13)=0

We multiply parentheses

-10a+5-13=0

We add all the numbers together, and all the variables

-10a-8=0

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

-10a=8

a=8/-10

a=-4/5

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