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Aleksandr [31]
4 years ago
12

-4x+y= 6 -5x-y=21 what is the answer​

Mathematics
1 answer:
bekas [8.4K]4 years ago
6 0

Answer:

x=15

Step-by-step explanation:

21-6=15

-4x+y=-5x-y=15

x+y=-y=15

x=15

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<em><u>Solution:</u></em>

Given that,

your friend spends 6+5x minutes lifting weights

9x+8 minutes running on a treadmill

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