Hi Amber, try the methods that we all showed you in your previous questions. I can help you if you get stuck. To get you started try this 2x-3y=-15 x-4y = 0 hope this helps!

## Answers by Bindi D.

let's say Elena earned x dollars. Then Mario earned 3x dollars. x+ 3x = $11,000 4x = $11,000 x= $ 2,750 Elena earned $2,750.

4x+13y= 40 4x+3y= -40 ___________ subtract equation 2 from equation 1: 4x+13y =40 -4x-3y =-(-40) ______________ 10y = 40+40=80 y=8 substitute y=8 in equation 1 or 2 4x+ 3y= - 40 4x + 3 (8) = -40 4x + 24= -40 4x=...

Hi Amber, x - y = 120 (-y +y=0) x + y = 150 __________ 2x= 270 x= 135