Question

Write a system of two equations using x and y for the following problem: The sum of two numbers is 170 and their difference is 26. Find the two numbers.

Answer 1

x+y=170
x-y=26

Answer 2

Add the two equations. Can you do that?

Answer 3

I think so.

Answer 4

Solve for one variable in one of his equations above and substitute that variable into the other equation.

Answer 5

substitute that solution for that variable in the other*

Answer 6

Did you get it?

Answer 7

No.

Answer 8

What did you get when you added the two equations?

Answer 9

How do I add them?

Answer 10

I will show you. Watch

Answer 11

ok.