Solving Linear Eqns

SOLVING LINEAR EQUATIONS

Recall the following:

A linear equation is a polynomial of degree 1.
In order to solve for the unknown variable, you must isolate the variable
In the order of operations, multiplication and division are completed before addition and subtraction.

LINEAR EQUATION - Solve for x in the following equation.

Problem 7b:

eqnarray40

The exact answer is tex2html_wrap_inline88 The approximate answer is

Check the solution by substituting tex2html_wrap_inline92 or -1.848612 in the original equation for x. If the left side of the equation equals the right side of the equation after the substitution, you have found the correct answer.

Left Side:
Right Sides:

Since the left side of the original equation equals the right side of the original equation when the value -1.848612 is substituted for x, the solution x=-1.848612 is verified.

If you would to review the solution to 7c, click on Solution

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Author: Nancy Marcus