06-01-2020
Mathematics

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Y=4x and 3x+y=-21. Substitute

Respuesta :

001223239 001223239

16-02-2021

Answer: (-3,-12)

Step-by-step explanation:

Step 1: Solve Y = 4x

Step 2: Substitute 4x for y in 3x + y = -21

3x + y =-21

3x + 4x = -21

7x = -21( Divide both sides by 7)

7x/7 = -21/7

X = -3

Step 3: Substitute -3 for X in Y = 4x

Y = 4x

Y = (4)(-3)

Y= -12

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