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1 year ago

Xy=10 4x+2y=30 I need help asap

Mathematics

1 answer:

emmasim [6.3K]1 year ago

4 0

Answer:

x = 25/3; y = -5/3

Step-by-step explanation:

You did well so far by multiplying both sides of the first equation by 2.

Now notice that you have -2y in the new first equation and 2y in the second equation. -2y and 2y add to 0.

Now add the equations to eliminate y.

2x - 2y = 20

(+) 4x + 2y = 30

-------------------------

6x = 50

6x/6 = 50/6

x = 50/6 = 25/3

2x - 2y = 20

2(25/3) - 2y = 20

50/3 - 2y = 60/3

-2y = 60/3 - 50/3

-2y = 10/3

-2y/2 = (10/3)/(-2)

y = -5/3

Solution: x = 25/3; y = -5/3

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Read 2 more answers

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valentinak56 [21]

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180-80-60=40
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9.(180-40)divide by 2=70
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