Question

Write a system of two first degree equations involving the variables x and y that represent the conditions stated in the problem. Solve and graph
The sum of two numbers is 8. The difference of these numbers is 2. Find the numbers

Answer 1

Can you write an equation using "the sum of two numbers is 8"

Answer 2

No i am having alot of trouble

Answer 3

Please help

Answer 4

Let's start with an example.

The sum of two number is 4: x + y = 4
The difference of two number sis 2: x - y = 2

Find the numbers

x + y = 4 --> x = 4 - y

x - y = 2 --> substitute x = 4 - y in
4 - y - y = 2
4 - 2y = 2
4 - 2 = 2y
2 = 2y

1 = y

Substitute this back into any of the original equations

x + y = 4
x + 1 = 4

x = 3

Follow this method for your current problem.

Answer 5

Ok i will try wait one minute

Answer 6

Y =3 and x=5

Answer 7

Perfect

Answer 8

Thank you