Solve a-b=8quad[a]

$$a - b = 8 \quad [ a ]$$

Solve for a

$$a=-\frac{b}{7}$$

Steps for Solving Linear Equation

Subtract 8a from both sides.

$$a-b-8a=0$$

Combine a and -8a to get -7a.

$$-7a-b=0$$

Add b to both sides. Anything plus zero gives itself.

$$-7a=b$$

Divide both sides by -7.

$$\frac{-7a}{-7}=\frac{b}{-7}$$

Dividing by -7 undoes the multiplication by -7.

$$a=\frac{b}{-7}$$

Divide b by -7.

$$a=-\frac{b}{7}$$

Solve for b

$$b=-7a$$

Steps for Solving Linear Equation

Subtract a from both sides.

$$-b=8a-a$$

Combine 8a and -a to get 7a.

$$-b=7a$$

Divide both sides by -1.

$$\frac{-b}{-1}=\frac{7a}{-1}$$

Dividing by -1 undoes the multiplication by -1.

$$b=\frac{7a}{-1}$$

Divide 7a by -1.

$$b=-7a$$