y=x-2
y=2x
X=-2
Is Y=0
IS Y=0
No. y is not zero. It is twice what x is, and you already correctly concluded that x = -2
Make the substitution 2x for y in the first equation and you get
2x = x - 2
Therefore x = -2
You can then use either equation to find that y = -4
your teacher is giving you a test worth 100 points containing 40 questions.There are two-point and four-point questions on the test.How many of each type of question are on the test?
To solve the system of equations y = x - 2 and y = 2x, we can use the method of substitution. Here's how to do it:
Step 1: Set the two equations equal to each other:
x - 2 = 2x
Step 2: Simplify the equation by subtracting x on both sides:
-2 = x
Step 3: Now that we have the value of x, we can substitute it back into one of the original equations to find the value of y. Let's use the equation y = x - 2:
y = (-2) - 2
y = -4
So the solution to the system of equations is x = -2 and y = -4.