Given the following system of equations: -4x + 8 = 16 and 2x + 4y = 32, to create the new equivalent system of equations -2x + 4y = 8 and 2x + 4y = 32, the first equation was divided by -2.

Mathematics · Middle School · Thu Feb 04 2021

Answered on

To understand how we obtain the new system of equations from the given system, let's analyze the transformation step by step.

The given system of equations is: 1) -4x + 8 = 16 2) 2x + 4y = 32

The problem states that the first equation was divided by -2 to create an equivalent equation. Dividing each term in the first equation by -2 will result in: (-4x / -2) + (8 / -2) = (16 / -2)

Simplifying each term gives us: 2x - 4 = -8

But we wanted the new equation to be -2x + 4y = 8, according to what was stated. There seems to be a mistake either in the transformation process or in the statement of the new system because when we divide the first original equation by -2, we do not get -2x + 4y = 8.

Let's check by correcting what appears to be the transcription error and divide the entire first equation by -2: (-4x / -2) + (8 / -2) = (16 / -2)

Calculating each part: 2x - 4 = -8

To get to the correct form as mentioned (-2x + 4y = 8), we can multiply the entire equation we got from the division by -1: (2x - 4) * -1 = (-8) * -1

This gives us: -2x + 4 = 8

Now, we are still missing the "y" term. Since the original equation does not have a "y" term, there is no way to just divide or multiply to get a "y" term from the first original equation. It seems there is a misunderstanding in the statement provided.

The new system of equation provided (-2x + 4y = 8 and 2x + 4y = 32) cannot be obtained by merely dividing the first original equation by -2. The "4y" term appears to be mistakenly inserted into the equation, or there may have been an error in how the problem was conveyed.