4(5-a)=12

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Solution for 4(5-a)=12 equation: 



4(5-a)=12

We move all terms to the left:

4(5-a)-(12)=0

We add all the numbers together, and all the variables

4(-1a+5)-12=0

We multiply parentheses

-4a+20-12=0

We add all the numbers together, and all the variables

-4a+8=0

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

-4a=-8

a=-8/-4

a=+2

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