42=7(t-4)

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Solution for 42=7(t-4) equation: 



42=7(t-4)

We move all terms to the left:

42-(7(t-4))=0



We calculate terms in parentheses: -(7(t-4)), so:

7(t-4)

We multiply parentheses

7t-28

Back to the equation:

-(7t-28)



We get rid of parentheses

-7t+28+42=0

We add all the numbers together, and all the variables

-7t+70=0

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

-7t=-70

t=-70/-7

t=+10

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