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Use the system of equations below to answer the questions 1-3. -2x + y = 4 2x + 3y = 20 1) Which of the following problems is created by using the elimination method on the system above? a) 4x + 4y = 24 b) 4y = 24 c) - 4x + 3y = 24 d) - 2y = 16 2) Find the value of y. Show all of your work. 3) Find the value of x. Show all of your work.

Sagot :

Answer:

1. 4y = 24

2. y = 6

3. x = 1

Explanation:

Given the below equations;

[tex]\begin{gathered} -2x+y=4 \\ 2x+3y=20 \end{gathered}[/tex]

Let's go ahead and eliminate x by adding both equations together, we'll have;

[tex]4y=24[/tex]

Let's find y by dividing both sides of the 4;

[tex]\begin{gathered} \frac{4y}{4}=\frac{24}{4} \\ y=6 \end{gathered}[/tex]

Since y = 6, let's find x using the 1st equation;

[tex]\begin{gathered} -2x+6=4 \\ -2x=4-6 \\ x=\frac{-2}{-2} \\ x=1 \end{gathered}[/tex]

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