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18-01-2017
Mathematics

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The sum of two numbers, a and b, is 12. Their difference is 8. Find the larger number.

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18-01-2017

a+b = 12
a-b = 8
...........add
2a = 20
a =10

a + b = 12
10 + b = 12
b = 2

answer: larger number is 10

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