(3a-1)-(4-2a)=-30

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Solution for (3a-1)-(4-2a)=-30 equation: 



(3a-1)-(4-2a)=-30

We move all terms to the left:

(3a-1)-(4-2a)-(-30)=0

We add all the numbers together, and all the variables

(3a-1)-(-2a+4)-(-30)=0

We add all the numbers together, and all the variables

(3a-1)-(-2a+4)+30=0

We get rid of parentheses

3a+2a-1-4+30=0

We add all the numbers together, and all the variables

5a+25=0

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

5a=-25

a=-25/5

a=-5

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