Question

Help me solve this system of equations?
4x + 3y = -1
3x + y = 3 It's my last question on this test!

Answer 1

I've solved 10 out of 11 on my own! This is my last one I could use some help on c:

Answer 2

4x + 3y = -1 -(1)
3x + y = 3 => y = 3 - 3x -(2)

Sub (2) into (1)
4x + 3 (3 - 3x) = -1
4x + 9 - 9x = -1
-5x = -10
x = ...?

Sub x = ... into (2) to find y.

Answer 3

Or multiply the second equation by (-3) and solve by elimination:
4x+3y=-1
-9x-3y=-9
You get the same thing, -5x=-10
Or graph both equations and find the intersection - so many ways to skin a cat

Answer 4

friend you can do this sum by using matrix cramers rule.