Question

What is the difference of 8 and sum of 18

Answer 1

Answer:

13 and 5

Step-by-step explanation:

When we write out the system of equations, we will get:

 

x+y=18

x-y=8

 

• We can then use elimination to get just one variable.
•   x+y=18
• +x-y=  8
• Which gives us:   2x=26
• We then divide by 2 and get:    x=13
• We next plug that into one of the two equations and solve for the other variable:    (13)+y=18
• We subtract 13 from both sides and get:   y=5
• So the two numbers are 13 and 5.

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Answer 2

Answer:

let the no. be x and y

case 1,

x - y = 8

x = 8+y

case 2,

x + y = 18

putting the value of x

8 + y + y = 18

8 +2y = 18

2y = 10

y = 5

put the value of y in x

x = 8 + 5

x = 13