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2 years ago

I need help with number 4.

Mathematics

2 answers:

uranmaximum [27]2 years ago

8 0

Answer: n=4 y=3

Step-by-step explanation:

3n - y = 9

2n + y = 11

n=4

3(4) - y = 9

12 - y = 9

y=3

Marianna [84]2 years ago

8 0

3x-y=9-(1)
2x+y=11--(2)

Adding both

5x=20
x=4

And

Put in eq(1)

3(4)-y=9
12-y=9
y=3

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