The phrase "varies directly as" means that there is a number k such that w = k(2x - 1). From the results given for w = 9 when x = 2, 9 = k(4 - 1), or k = 3. Then when w is 15, 15 = 3(2x - 1), or 15 = 6x - 3, or 6x = 15 + 3, or x = 18/6 = 3.
6x - 12 = 3x + 15 3x = 27 x = 9
X=5
7+x=15 x=8
If 5 x equals 9 plus 2x then x equals?
x-9 = 15 x = 15+9 x = 24
15
9 x 9 and 9 x 15
24 24 + (-15) = 9
6
Rfh
(3x - 9 =15) +9 = 3x=(24)/3 = x=8 x=8
n X .15 = 9 9 / .15 = n 9 / .15 = 60
9 less than 24 equals 15. 24-9=15 x - 9 = 15
-3x=-15+6 -3x=-9 x=-9/-3 x=3
6x-x+15-9= 6x-x=5x 15-9=6 5x+6=0 5x=-6 x=-1.2
Let the number be x and if 9+2x = 15 then x equals 3