1)What if you have two equations equal to y? How do you solve for x? 2)If you need to solve for a variable to substitute, what is your first step?
3)What does it mean to substitute for a value?

Step-by-step explanation:

If you have two equations for y, eliminate y by setting these two equations equal to one another.  Solve the resulting equation for x.  Then substitute your x value into one of the equations for y.  Write your solution as (x, y).

2)  If you need to solve for a variable to substitute, what is your first step?  Example:  If you have two equations for y, eliminate y by setting the two equations equal to each other.  This decides for you that you must solve for x.

3)  What does it mean to substitute for a value?  Example:  If you have y = 3x and 2x + y = 17, replace y in the second equation with 3x.  This eliminates y and allows you to solve for x.

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i