126=7(3-5k)

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Solution for 126=7(3-5k) equation: 



126=7(3-5k)

We move all terms to the left:

126-(7(3-5k))=0

We add all the numbers together, and all the variables

-(7(-5k+3))+126=0



We calculate terms in parentheses: -(7(-5k+3)), so:

7(-5k+3)

We multiply parentheses

-35k+21

Back to the equation:

-(-35k+21)



We get rid of parentheses

35k-21+126=0

We add all the numbers together, and all the variables

35k+105=0

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

35k=-105

k=-105/35

k=-3

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