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Read the following:
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**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 operation, multiplication and division are completed before addition and subtraction.**

LINEAR EQUATIONS - Solve for *x* in the following equation.

Example 3:

Subtract 2*x* from both sides of the equation:

Subtract 5 from both sides of the equation:

Divide both sides by 2:

The answer is *x* = 9.

Check the solution by substituting 9 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:
4(9) + 5 = 41 - Right side:
2(9) + 23 = 41

If you would like to test yourself by working some problems similar to this example, click on problem.

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