GMAT Maths Algebra - Linear Equations

A literal equation is an equation that contains two or more variables. It may be in the form of a formula.You
may be asked to solve a literal equation for one variable in terms of the other variables. Use the same steps
that you used to solve linear equations.

Example
Solve for x in terms of a and b: 2x + b = a
Subtract b from both sides of the equation: 2x + b – b = a – b

Divide both sides of the equation by 2: 2x/2 = (a-b)/2