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Solution 2.2:1b

From Förberedande kurs i matematik 1

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m (Lösning 2.2:1b moved to Solution 2.2:1b: Robot: moved page)
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To get
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<center> [[Image:2_2_1b.gif]] </center>
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<math>x</math>
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by itself on the left-hand side, we subtract
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<math>1</math>
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from both sides
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<math>2x+1-1=13-1</math>
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which gives
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<math>2x=12</math>
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Then divide both sides by 2,
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<math>\frac{2x}{2}=\frac{12}{2}</math>
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to get
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<math>x</math>:
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<math>x=6</math>

Revision as of 14:13, 16 September 2008

To get x by itself on the left-hand side, we subtract 1 from both sides


2x+1−1=13−1


which gives


2x=12

Then divide both sides by 2,


22x=212


to get x:


x=6

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