Question

What is the solution to the equation below sqrt x-9=-6
A.x=3
B.x=9
C.x=sqrt 15
D.x=sqrt 3

Answer 1

Answer:

A. x = 3

Step-by-step explanation:

When trying to find x, we first need to isolate it and only have x on one side. The way to do that with addition or subtraction is to do the opposite to BOTH sides of the equation.

This would mean we take

x - 9 = -6

Then add 9 to both sides to make the -9 on the left side 0, but you MUST do that to both sides, so also add 9 to the -6

x - 9 = -6

  + 9    + 9

x - 0 = 9 - 6

x = 3

Answer 2

The answer is X=-3 because you change the negative 9 to a positive one and add it to the other side