3 years ago

Solve the system by substitution. y = -2.x y = -9x + 21

2 answers:

7 0

Answer:

(3, -4)

Step-by-step explanation:

LiRa [457]3 years ago

5 0

since y=-2x, we can substitute into the second equation to get:

-2x=-9x+21

add 9x

7x=21

divide by 7

x=3

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