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olga nikolaevna [1]
3 years ago
15

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

Mathematics
1 answer:
FromTheMoon [43]3 years ago
3 0
3y+5=7x

3y=7x-5

y=(7x-5)/3

...

21y-49x becomes

7(7x-5)-49x

49x-35-49x

-35
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lina2011 [118]
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7 0
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Question 2 of 10
muminat

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vovangra [49]

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3 years ago
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