(10-4a)=30

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Solution for (10-4a)=30 equation: 



(10-4a)=30

We move all terms to the left:

(10-4a)-(30)=0

We add all the numbers together, and all the variables

(-4a+10)-30=0

We get rid of parentheses

-4a+10-30=0

We add all the numbers together, and all the variables

-4a-20=0

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

-4a=20

a=20/-4

a=-5

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