Solve -9(x+8)=-9x-72

$$- 9 ( x + 8 ) = - 9 x - 72$$

Solve for x (complex solution)

$$x\in \mathrm{C}$$

Solution Steps

Use the distributive property to multiply -9 by x+8.

$$-9x-72=-9x-72$$

Add 9x to both sides.

$$-9x-72+9x=-72$$

Combine -9x and 9x to get 0.

$$-72=-72$$

Compare -72 and -72.

$$\text{true}$$

This is true for any x.

$$x\in \mathrm{C}$$

Solve for x

$$x\in \mathrm{R}$$

Solution Steps

Use the distributive property to multiply -9 by x+8.

$$-9x-72=-9x-72$$

Add 9x to both sides.

$$-9x-72+9x=-72$$

Combine -9x and 9x to get 0.

$$-72=-72$$

Compare -72 and -72.

$$\text{true}$$

This is true for any x.

$$x\in \mathrm{R}$$