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abruzzese [7]
3 years ago
14

X+ 3y = 9 2x+ y = -2 Solve for x and y

Mathematics
1 answer:
Natali5045456 [20]3 years ago
7 0

Answer:

(-3, 4)

Step-by-step explanation:

<em>hey there,</em>

<em />

< From the first equation, let's find x.

x + 3y = 9

x = 9-3y    (I hope you understand how that works )

Next, we can substitute our equation that equals to x into the second equation.

2x + y = -2

2(9-3y) + y = -2     (I substituted "x" in "2x" with (9-3y))

Now, let's solve.

2(9-3y) + y = -2

18 - 6y + y = -2

-5y = -20

y = 4

Now that we have found what y is equal to, we can find x too. In the beginning we found that x = 9-3y so x = 9-3(4) = -3 >

<u>Hope this helped! Feel free to ask anything else.</u>

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The interest due on financing option is $307.50

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Complete question:

Mr. and Mrs. Chan want to buy new furniture that has a cash price of $6230. On the installment plan, they must pay %25 of the cash price as a down payment and make twelve monthly payments of $415. How much interest did they pay due to financing?

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