Solve 9(9-2D)(9+40)=(9-D)

$$9 ( 9 - 2 D ) ( 9 + 40 ) = ( 9 - D )$$

Solve for D

$$D = \frac{3960}{881} = 4\frac{436}{881} \approx 4.494892168$$

Steps for Solving Linear Equation

Add 9 and 40 to get 49.

$$9\left(9-2D\right)\times 49=9-D$$

Multiply 9 and 49 to get 441.

$$441\left(9-2D\right)=9-D$$

Use the distributive property to multiply 441 by 9-2D.

$$3969-882D=9-D$$

Add D to both sides.

$$3969-882D+D=9$$

Combine -882D and D to get -881D.

$$3969-881D=9$$

Subtract 3969 from both sides.

$$-881D=9-3969$$

Subtract 3969 from 9 to get -3960.

$$-881D=-3960$$

Divide both sides by -881.

$$D=\frac{-3960}{-881}$$

Fraction \frac{-3960}{-881} can be simplified to \frac{3960}{881} by removing the negative sign from both the numerator and the denominator.

$$D=\frac{3960}{881}$$