Question

Evaluate the function found in the previous step at X =-3

Answer 1

`x-5y=-4x-2y`

In order to evaluate the given function at x = -3, simply replace "x" in the function with -3 and solve.

`-3-5y=-4(-3)-2y`

Multiply -4 and -3 in the function above.

`-3-5y=12-2y`

Add 3 on both sides of the equation.

`-3-5y+3=12-2y+3`
`-5y=15-2y`

Add 2y on both sides of the equation.

`-5y+2y=15-2y+2y`
`-3y=15`

Divide both sides of the equation by -3.

`(-3y)/(-3)=(15)/(-3)`
`y=-5`

Therefore, at x = -3, the value of y = -5. Hence, f(-3) = -5.

Answer:

f(-3) = -5