Anonymous

One number is 5 more than twice another number. If the difference of the two numbers is 7, what are the two numbers?

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1 Answers

John McCann Profile
John McCann answered

Looks like a system of equations will solve this.

X = one number

Y = another number

-----------------------------------

X - Y = 7

X = 2Y + 5
-------------------------------------Rearrange top equation.

X = 7 + y

--------------Insert into bottom equation.

7 + Y = 2Y +5

7 = Y + 5

2 = Y

=========Find X in top first equation ( X - Y = 7)

X - 2 = 7

X = 9

======You have checked one equation, now check this original equation.

X = 2Y + 5

9 = 2(2) + 5

9 = 9

=======Checks and is consistent.

Y = 2

X = 9

2 People thanked the writer.
Don Barzini
Don Barzini commented
Gold star ⭐️ for today's assignment, Mr McCann.
John McCann
John McCann commented
Thank you!

Better than that ten dollars an hour I made as a biology tutor at City College Of San Francisco!

It did take a couple days to come into focus. Dementia around the corner!

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