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Find x and y from -7x+3y=12 2x-8y=32

1 Answer

1 vote

Answer:

x = -3.84

y = -4.96

Explanation:

-7x+3y=12

2x-8y=32

We multiply the first equation by 2 and the second equation by 7

-14x + 6y = 24

14x -56y = 224

-50y = 248

y = -4.96

Now put -4.96 in for y and solve for x

-7x+3(-4.96) = 12

-7x - 14.88 = 12

-7x = 26.88

x = -3.84

Let's check

-7(-3.84) + 3(-4.96) = 12

26.88 - 14.88 = 12

12 = 12

So, x = -3.84, and y = -4.96 is the correct answer.

User Dorgham
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