Solving Equations of the First Degree with One Unknown. Transpose all the terms containing the unknown x to one side of the equals sign, and all the other terms to the other side. Combine and simplify the expressions as far as possible, and divide both sides by the coefficient of the unknown x. (See the rules given for transposition of formulas.)

Example:

Solution of Equations of the First Degree with Two Unknowns. The form of the simplified equations is

Then

Example:

The value of y can now be most easily found by inserting the value of x in one of the equations: