You really should use your calculator for such simple questions instead of posting them on WA . It requires far fewer key depressions and you get your answer quicker. However, since you are obviously incapable of carrying out even such a simple task, and the answer is 18.
-9
x^2 +9 =x^2 -9 9=-9 No solution
x2-7x-18 (x-9) (x+2) x=9 x=-2 X= either 9 or -2
To find the value of x when 2x equals 9, you can divide both sides of the equation by 2. This gives you x = 9/2, which simplifies to x = 4.5. Thus, the value of x is 4.5.
To find what times 9 equals 18, you can set up the equation (9x = 18). Solving for (x) gives (x = 18 ÷ 9), which simplifies to (x = 2). Therefore, 2 times 9 equals 18.
x+2=9 x=9-2 x=7
-9
9
log9(x)=2 x=9^2 x=81
x=-1/2
x^2 +9 =x^2 -9 9=-9 No solution
If x=9, x=9
x2-7x-18 (x-9) (x+2) x=9 x=-2 X= either 9 or -2
X=2
It is an algebraic expression involving x. Of do you mean 'what is x if 2x - 9 equals 9?' 2x - 9 = 9 ⇒ 2x - 9 + 9 = 9 + 9 ⇒ 2x = 18 ⇒ 2x ÷ 2 = 18 ÷ 2 ⇒ x = 9
To find the value of x when 2x equals 9, you can divide both sides of the equation by 2. This gives you x = 9/2, which simplifies to x = 4.5. Thus, the value of x is 4.5.
x= 0.66666666 or 2/3