An algebra problem by Rostam Dana

Algebra Level 1

Solve 1 2 x − 7 = 0 \dfrac12 x- 7 = 0 .

100 14 7 16

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Rostam Dana by Rostam Dana , 20, Norway

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3 solutions

Galen Buhain
Jun 30, 2017

The very easy one! 1/2x-7=0

1/2x-7+7=7

1/2x=7

2(1/2x)=2(7)

x=14

1 Helpful 0 Interesting 0 Brilliant 0 Confused

Please change the notation to 1 2 x − 7 = 0 \frac12x-7=0 .

Using the slash makes it unclear if the x x is to be included in the denominator.

Thank you.

Marta Reece - 3 years ago
Aman Real
Mar 31, 2015

I think this question is wrong as the ans should have been 1/14.and not 14

0 Helpful 0 Interesting 0 Brilliant 0 Confused

Yeah indeed

Rostam Dana - 6 years, 2 months ago

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Problem is that it reads like 1 divided by 2x but it was meant to be (1/2)x. Line spacing format caused confusion

Greg Grapsas - 3 years, 2 months ago
Rostam Dana
Oct 1, 2014

1/2x-7=0 7*2=14 14=x

hope you enjoyed.)

by rostam dana ,13

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