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Darina [25.2K]
3 years ago
11

How to solve -4x+8y=-24

Mathematics
1 answer:
lukranit [14]3 years ago
8 0

Answer:

x=6

y=-3

Step-by-step explanation:

<em><u>solve for x-</u></em>

-4x+8y=-24 replace y with 0

-4x+8(0)=-24

-4x=-24 divide by -4 on both sides

x=6

<u><em>Solve for y-</em></u>

-4x+8y=-24 replace x with 0

-4(0)+8y=-24

8y=-24 divide by 8 from both sides

y=-3

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Step-by-step explanation:

Please consider the complete question.

An automobile firm wants to purchase either machine A or machine B. The intial cost of machines A and B are $40,000 and $50,000, respectively. The power consumption per year of machines A and B are 120 MWh and 100 MWh, respectively. The power cost is $40/MWh. The estimated operating and maintenance cost over 10 years is $30,000 for machine A and $20,000 for machine B.

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