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Archy [21]
3 years ago
10

Solve the system by the substitution method X+y = -9 Y = -4x

Mathematics
1 answer:
MrMuchimi3 years ago
3 0

x-4x=-9

-3x=-9

x=-9÷-3

×=3

y=-4 (3)

y=-12

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Answer:

12

Step-by-step explanation:

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