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alukav5142 [94]
3 years ago
8

Use substitution to solve the following system of equations. -2x + 4y = -18 AND x = y + 3

Mathematics
2 answers:
Annette [7]3 years ago
5 0

Answer:

x = -3    y = -6

Step-by-step explanation:

x = y + 3

x - 3 = y

-2x + 4(x - 3) = -18

-2x + 4x - 12 = -18

2x = -6

x = -3

x = y + 3

-3 = y + 3

-6 = y

loris [4]3 years ago
4 0

Answer:

x = -3 ; y = -6

Step-by-step explanation:

x = y + 3

-2x + 4y = -18

-2(y+3) + 4y = -18

-2y -6 + 4y = -18

2y = -12

y = -6

x = -6+3

x = -3

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