Question

(3x – 9)º (X + 7)º Value of X?

Answer 1

Answer:

$\huge \boxed{X=8}$

Step-by-step explanation:

The value of x is ⇒ 3x-9=x+7

Solve 3x-9=x+7

Add by 9 from both sides of equation.

$\displaystyle 3x-9+9=x+7+9$

Simplify.

$\displaystyle 3x=x+16$

Subtract by x from both sides of equation.

$\displaystyle 3x-x=x+16-x$

Simplify.

$\displaystyle 2x=16$

Divide by 2 from both sides of equation.

$\displaystyle \frac{2x}{2}=\frac{16}{2}$

Finally, simplify to find the answer.

$\displaystyle 16\div2=8$

X=8, which is our answer.

Answer 2

Answer:

If they're equal, x=8

Step-by-step explanation:

3x-9=x+7. Add 9 to each side and sibtract x from each side. This leaves 2x=16. Divide by 2 to isolate x. x=8