3 years ago

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

Mathematics

1 answer:

galben [10]3 years ago

5 0

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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