l2at8aykelsen l2at8aykelsen

23-09-2016
Mathematics

contestada

two times a number plus 6 equals 20

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Sherylsofavored Sherylsofavored

23-09-2016

The answer is seven, 7+7=14+6+20

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samgoddard samgoddard

23-09-2016

First subtract 6 from 20, then you can deduce what the other number is. Seven times two is 14, so we know the missing number is 7.

You could also write it as the algebraic expression 2x + 6 = 20
2x+6=20
-6 -6
2x=14
14/2=7
x = 7

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