If 3y+5=7x, then 21y-49x=?

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asked Mar 22, 2018 174k views

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If 3y+5=7x, then 21y-49x=?

Mathematics
college

Winqoo asked

by Winqoo

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3y+5=7x

3y=7x-5

y=(7x-5)/3

...

21y-49x becomes

7(7x-5)-49x

49x-35-49x

-35

Ashwini Khare answered Mar 27, 2018

by Ashwini Khare

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