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Pavlova-9 [17]
2 years ago
7

Solve the following system of equations

Mathematics
1 answer:
Katyanochek1 [597]2 years ago
8 0

Answer:

x = -9

y = -3

Step-by-step explanation:

We can first multiply the 2nd equation by -6, so we have:

-6*[-0.8x+0.4y=6]\\=4.8x-2.4y=-36

Now, we add up this equation to the 1st equation given to eliminate y and solve for x. Shown below:

1.2x+2.4y=-18\\4.8x-2.4y=-36\\---------\\6x=-54\\x=-9

So, we have the value of x to be -9

Now, we substitute this value in 1st equation and solve for y:

1.2x+2.4y=-18\\1.2(-9)+2.4y=-18\\-10.8+2.4y=-18\\2.4y=-7.2\\y=-3

The value of y is -3

So,

<u>x = -9</u>

<u>y = -3</u>

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