74=2a+4(5-4a)

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Solution for 74=2a+4(5-4a) equation: 



74=2a+4(5-4a)

We move all terms to the left:

74-(2a+4(5-4a))=0

We add all the numbers together, and all the variables

-(2a+4(-4a+5))+74=0



We calculate terms in parentheses: -(2a+4(-4a+5)), so:

2a+4(-4a+5)

We multiply parentheses

2a-16a+20

We add all the numbers together, and all the variables

-14a+20

Back to the equation:

-(-14a+20)



We get rid of parentheses

14a-20+74=0

We add all the numbers together, and all the variables

14a+54=0

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

14a=-54

a=-54/14

a=-3+6/7

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