millerluke millerluke

02-10-2020
Mathematics

contestada

Solve the system by substitution.
3x +2y=-21
x+y=-9

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02-10-2020

Answer:

Step-by-step explanation:

3x +2y=-21 and x+y=-9

3x +2y=-21 and x = -9-y

=> 3(-9 - y) + 2y = -21

-27 -3y + 2y = -21

-y = 6

y= -6

=> x = -9+6= -3

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