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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

User DaCh
by
8.9k points

1 Answer

2 votes

Answer:

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...

User Wjordan
by
8.8k points

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