Question

If RS = 9, ST = 3x, and RT = 6x, what is RT?

Answer 1

9+3x=6x
-3x -3x
—————
9=3x
9/3=3x/3
3=x
x=3

6(3)
18

RT is 18

Answer 2

So segments RS and ST add to get RT, making your equation RS+ST=RT. Plug in all the known values, getting you the equation 9+3x=6x. Solve for X by subtracting the 3x on both sided and dividing by 3, making X=3. Now, plug in the value of X into RT=6x. 6*3=18, meaning RT=18