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An integer is 6 less than 4 times another. If the product of the two integers is 70, thenfind the integers.

User Jack Cox
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1 Answer

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11 votes
Answer:

The two integers are 5 and 14

Explanations:

Let the two integers be x and y

An integer is 6 less than 4 times another

x = 4y - 6.............(1)

The product of the two integers is 70

xy = 70.............(2)

Substitute equation (1) into equation (2)

(4y-6)y = 70

4y² - 6y - 70 = 0

Divide through by 2, the equation becomes:

2y² - 3y - 35 = 0

2y² - 10y + 7y - 35 = 0

2y(y - 5) + 7(y - 5) = 0

(y - 5) (2y + 7) = 0

y - 5 = 0

y = 5

2y + 7 = 0

2y = -7

y = -7/2 (This is not possible since only integer values are expected)

Substitute y = 5 into equation (1)

x = 4y - 6

x = 4(5) - 6

x = 20 - 6

x = 14

The two integers are 5 and 14

User Donyella
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