Solve x-d-(-16)=12+13

$$x - d - ( - 16 ) = 12 + 13$$

Solve for d

$$d=x-9$$

Steps for Solving Linear Equation

The opposite of -16 is 16.

$$x-d+16=12+13$$

Add 12 and 13 to get 25.

$$x-d+16=25$$

Subtract x from both sides.

$$-d+16=25-x$$

Subtract 16 from both sides.

$$-d=25-x-16$$

Subtract 16 from 25 to get 9.

$$-d=9-x$$

Divide both sides by -1.

$$\frac{-d}{-1}=\frac{9-x}{-1}$$

Dividing by -1 undoes the multiplication by -1.

$$d=\frac{9-x}{-1}$$

Divide 9-x by -1.

$$d=x-9$$

Solve for x

$$x=d+9$$

Solution Steps

The opposite of -16 is 16.

$$x-d+16=12+13$$

Add 12 and 13 to get 25.

$$x-d+16=25$$

Add d to both sides.

$$x+16=25+d$$

Subtract 16 from both sides.

$$x=25+d-16$$

Subtract 16 from 25 to get 9.

$$x=9+d$$