SOLVING LINEAR EQUATIONS

Recall the following:


Problem 1.4e:

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Answer: tex2html_wrap_inline872

Solution: Multiply both sides by 105, the lowest number that 3, 7, and 35 will divide into evenly.

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Simplify:

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Subtract 45x from both sides of the equation:

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Add 98 to both sides of the equation:

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Divide both sides by 130:

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The answer is tex2html_wrap_inline872 .




Check the solution by substituting tex2html_wrap_inline878 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.

You can also check your answer with the calculator. tex2html_wrap_inline886 Since the left side of the original equation equals the right side of the original equation when tex2html_wrap_inline878 substituted for x, then tex2html_wrap_inline872 is the correct answer.

You can also check your answer by graphing tex2html_wrap_inline898 (left side of the original equation minus the right side of the original equation). The x intercept is .8.



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Author:Nancy Marcus

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