Sometimes the form of an answer can be changed. Compare the solution with that obtained in the example. Solve the equation 2x + 2y - 9x + 9a by first subtracting 2.v from both sides.

We divide by the coefficient of x, which in this case is ab. The step-by-step procedure discussed and used in chapter 2 is still valid after any grouping symbols are removed.Įxample 1 Solve for c: 3(x + c) - 4y = 2x - 5cĪt this point we note that since we are solving for c, we want to obtain c on one side and all other terms on the other side of the equation. It is occasionally necessary to solve such an equation for one of the letters in terms of the others. Apply previously learned rules to solve literal equations.Īn equation having more than one letter is sometimes called a literal equation.Upon completing this section you should be able to: Then follow the procedure learned in chapter 2. Would be to first subtract 3x from both sides obtainingįirst remove parentheses. Using the same procedures learned in chapter 2, we subtract 5 from each side of the equation obtainingĮxample 2 Solve for x and check: - 3x = 12 Upon completing this section you should be able to solve equations involving signed numbers.Įxample 1 Solve for x and check: x + 5 = 3 SOLVING EQUATIONS INVOLVING SIGNED NUMBERS OBJECTIVES We will also study techniques for solving and graphing inequalities having one unknown. Now that we have learned the operations on signed numbers, we will use those same rules to solve equations that involve negative numbers. In chapter 2 we established rules for solving equations using the numbers of arithmetic. Equations and Inequalities Involving Signed Numbers

15 x 15 multiplication chart