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Solution 2.2:1d

From Förberedande kurs i matematik 1

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m (Lösning 2.2:1d moved to Solution 2.2:1d: Robot: moved page)
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Move
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<center> [[Image:2_2_1d.gif]] </center>
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<math>x</math>
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{{NAVCONTENT_STOP}}
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to the left-hand side by subtracting
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<math>2x</math>
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from both sides,
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<math>5x+7-2x=2x-6-2x</math>
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which gives
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<math>3x+7=-6</math>
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Subtract
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<math>7</math>
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from both sides,
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<math>3x+7-7=-6-7</math>
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so that the term
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<math>3x</math>
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alone remains on the left-hand side
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<math>3x=-13</math>
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Then, divide both sides by
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<math>3</math>
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<math>\frac{3x}{3}=-\frac{13}{3}</math>
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to get x:
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<math>x=-\frac{13}{3}</math>

Revision as of 14:28, 16 September 2008

Move x to the left-hand side by subtracting 2x from both sides,


5x+7−2x=2x−6−2x


which gives


3x+7=−6


Subtract 7 from both sides,


3x+7−7=−6−7


so that the term 3x alone remains on the left-hand side


3x=−13


Then, divide both sides by 3


33x=−313


to get x:


x=−313

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