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simple question of maths please help

Algebra
Tutor: None Selected Time limit: 1 Day

a + b = 74 a - b = 23 a,b = ?

Mar 18th, 2015

add the two eqs, we have 

2a = 74+23 = 97

a = 48.5

plug this into a+b = 74

b = 74-a = 74-48.5 = 25.5 

Mar 18th, 2015

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Mar 18th, 2015
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Mar 18th, 2015
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