A teacher has 100 pencils in a cup. 16 are more sharp than dull. How many are dull and how many are sharp?

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02-11-2017
Mathematics

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A teacher has 100 pencils in a cup. 16 are more sharp than dull. How many are dull and how many are sharp?

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jmja59oyri47 jmja59oyri47 · Answer 1 · 2017-11-02T02:37:03+01:00

jmja59oyri47 jmja59oyri47

02-11-2017

x = dull pencils
y = sharp pencils
x + y = 100
y = x + 16 ~~Plug this back into your original x+y equation.
x+x+16=100 ==> 2x = 84 ==> x = 42. Plug this back into the y = equation
y = 42 + 16 ==> y = 58.

42 Dull, 58 sharp.

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