3a+4=2(7-a)

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Solution for 3a+4=2(7-a) equation: 



3a+4=2(7-a)

We move all terms to the left:

3a+4-(2(7-a))=0

We add all the numbers together, and all the variables

3a-(2(-1a+7))+4=0



We calculate terms in parentheses: -(2(-1a+7)), so:

2(-1a+7)

We multiply parentheses

-2a+14

Back to the equation:

-(-2a+14)



We get rid of parentheses

3a+2a-14+4=0

We add all the numbers together, and all the variables

5a-10=0

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

5a=10

a=10/5

a=2

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