-2a=-4(a-3)

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Solution for -2a=-4(a-3) equation: 



-2a=-4(a-3)

We move all terms to the left:

-2a-(-4(a-3))=0



We calculate terms in parentheses: -(-4(a-3)), so:

-4(a-3)

We multiply parentheses

-4a+12

Back to the equation:

-(-4a+12)



We get rid of parentheses

-2a+4a-12=0

We add all the numbers together, and all the variables

2a-12=0

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

2a=12

a=12/2

a=6

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