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

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

Solve for D

$$D = \frac{432}{97} = 4\frac{44}{97} \approx 4.453608247$$

Steps for Solving Linear Equation

Add 9 and 40 to get 49.

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

Use the distributive property to multiply 9-2D by 49.

$$441-98D=9-D$$

Add D to both sides.

$$441-98D+D=9$$

Combine -98D and D to get -97D.

$$441-97D=9$$

Subtract 441 from both sides.

$$-97D=9-441$$

Subtract 441 from 9 to get -432.

$$-97D=-432$$

Divide both sides by -97.

$$D=\frac{-432}{-97}$$

Fraction \frac{-432}{-97} can be simplified to \frac{432}{97} by removing the negative sign from both the numerator and the denominator.

$$D=\frac{432}{97}$$