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20-04-2017
Mathematics

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a number is increased by 21 is equal to half of the number increased by 18.5 what is the number

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Olivia123456 Olivia123456

20-04-2017

x + 21 = (x + 18.5) × 2
x + 21 = 2x + 37
-37 -37
_____________
x - 16 = 2x
-x -x
-16 = x

-16 + 21 = 5
-16 + 18.5 = 2.5

The number is -16.

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