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08.01.2020 •
Mathematics
The sum of twice a first number and 4 times the second number is 20. the first number is 3 times the second. find the numbers
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Ответ:
Then,
2x+4y = 20
x=3y
Substituting for x,
2(3y)+4y=20 => 6y+4y =20 =>10y=20 =>y =20/10 = 2
And therefore, x=3y = 3*2 = 6
Therefore,
First number = 6 and second number =2
Ответ:
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