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3 years ago

The sum of two numbers is 15. one number is 7 less then the other. what are the two numbers

Mathematics

2 answers:

Serjik [45]3 years ago

7 0

Answer:

One number is 4, the other is 11

Step-by-step explanation:

"The sum of two numbers is 15" can be written as

x + y = 15 where x is one number, and y is the other. Their sum is 15

"one number is 7 less then the other' can be written as

x = y - 7 x is one number that is 7 less than the other

Now we know x = y - 7. We can plug that into the first equation x + y = 15 and solve...

The first equation is now...

y - 7 + y = 15 ('x' is substituted for y - 7)

Now solve...

2y - 7 = 15 (combine like terms)

2y = 22 (add 7 to both sides to isolate the term with the variable)

y = 11 (divide both sides by 2 to isolate the variable)

If y = 11, then

x + 11 = 15 (the 'y' in the first equation becomes 11)

Then x = 4 (subtract 11 from both sides to isolate x)

pav-90 [236]3 years ago

3 0

One is 11 and the other is 4

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Answer:

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Step-by-step explanation:

This is no ordinary problem. It actually requires you to solve two different problems in order to figure out the correct answer.

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3 years ago

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aalyn [17]

Answer:

Option A) 32c

Step-by-step explanation:

we know that

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