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2 years ago

Five times a number plus four times a second number is 20. Four times

Mathematics

1 answer:

dexar [7]2 years ago

4 0

Answer:

first number is 4

second number is 0

Step-by-step explanation:

y = 1st number

x = 2nd number

system of equations:

5y + 4x = 20

4y + 2x = 16

I multiplied the second equation by -2 to eliminate the 'x-values'

-2(4y + 2x = 16) = -8y - 4x = -32

now add to 1st equation: <u>5y + 4x = 20</u>

-3y = -12

y = 4

solve for 'x':

5(4) + 4x = 20

20 + 4x = 20

4x = 0

x = 0

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Answer:

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Step-by-step explanation:

This is a hard one

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3 years ago

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