If x/y=4, x-y=9, and y-x=(-9) then what is x and y?
from the first equation, x/y=4, we can find that x=4*y.
If we fill this in into the second equation, we get that:
x-y=9
<=> (4*y)-y = 9
<=> 3*y=9
<=> y=3
Knowing that y=3, we fill this in into our first equation and we get that:
x=4*y, so that x=4*3=12
So, y=3 and x=12
Thank u sooo much!! I couldn't have gotten it by myself. =D
Name the ordered pair if the x-intercept is -2.
To find the values of x and y, we can solve the given system of equations. Let's start by solving the first equation, x/y = 4.
Multiply both sides of the equation by y:
x = 4y (1)
Next, let's solve the second equation, x - y = 9. Since we already have an expression for x in terms of y from equation (1), we can substitute it in:
4y - y = 9
Combining like terms:
3y = 9
Divide both sides by 3:
y = 3 (2)
Now we have the value of y. To find x, we can substitute y = 3 into equation (1):
x = 4(3)
x = 12 (3)
Therefore, the solution to the system of equations is x = 12 and y = 3.