Question

Please sSHOW YOUR WORK AND help Im failing and need this by tmr

1) 4x+4y=-20
y=-7x-23

2) y=-4x+9
y=8x-3

Answer 1

1) x = - 4.67, y = 9.67

2) x = 1 , y = 5

Explanation:

1. rearrange + substitute:
2. 4y = 20 - 4x 5 - x = -23 - 7x
3. y = 5 - x 7x - x = -23 - 5
4. y = -23 - 7x 6x = -28
5. x = - 4.67
6. y = 5 - ( - 4.67) = 5 + 4.67 = 9.67

2. substitute:

-4x + 9 = 8x - 3 y = 8 - 3

9 + 3 = 8x + 4x y = 5

12 = 12x

1 = x

Good luck passing, make sure you don't fail...