Question

Use elimination to solve the system of equations. Find ordered pairs.

{ 5x-3y=42
8x+5y=28

Answer 1

Multiply the top equation by 5
Multiply the second equation by 3
Add the two equations.

Answer 2

25x-15y=210
24x+15y= 84
49x = 294
Now divide both sides by 49

Answer 3

What does x = ?

Answer 4

x=6 right?

Answer 5

yes. Now find y

Answer 6

how do i find y?

Answer 7

Replace x with 6 in any equation that has both an x and a y and solve that equation for y

Answer 8

so like 5x-3(6)=42?

Answer 9

I believe you said that x = 6. So why did you replace y with 6 if it is x that is equal to 6?

Answer 10

oh! so it would be 5(6)-3=42

i don't understand how to do these problems with elimination, I only know how to do them as substitution.

Answer 11

What happened to the y?