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2015-03-20T15:02:29+08:00

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4+ 3\cdot x=18 \\\\ 3\cdot x=18-4  \\\\ 3\cdot x =14 \\\\ \boxed{x=\frac{14}{3}\approx 4.6}
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2015-03-20T18:19:08+08:00

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 \frac{3x}{3}  \frac{3x}{3}  \frac{3x}{3} This is the Mathematical translation of that verbal expression:


four plus three times a number is eighteen

 4       +                    3x              =    18


Right now, what we are finding is x or the unknown number. To find x, subtract 4 to both sides, then divide both sides by 3.


4 + 3x = 18

4 + 3x - 4 = 18 - 4

3x = 14

3x/3 = 14 / 3

x = 14/3

Answer:

                        x = 14/3

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