Math, asked by rw0573, 1 month ago

The sum of two numbers is 18 and their difference is three

Answers

Answered by vanshdagur2009
1

Answer:

15

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Answered by Weeeeeeeee
0

Answer:

Step-by-step explanation:

The sum of x and y is 18. In other words, x plus y equals 18 and can be written as equation A:

x + y = 18

The difference between x and y is 3. In other words, x minus y equals 3 and can be written as equation B:

x - y = 3

Now solve equation B for x to get the revised equation B:

x - y = 3

x = 3 + y

Then substitute x in equation A from the revised equation B and then solve for y:

x + y = 18

3 + y + y = 18

3 + 2y = 18

2y = 15

y = 7.5

Now we know y is 7.5. Which means that we can substitute y for 7.5 in equation A and solve for x:

x + y = 18

x + 7.5 = 18

X = 10.5

Summary: The sum of two numbers is 18 and their difference is 3. What are the two numbers? Answer: 10.5 and 7.5 as proven here:

Sum: 10.5 + 7.5 = 18

Difference: 10.5 - 7.5 = 3

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