tapss22 tapss22

29-06-2018
Mathematics

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the sum of two numbers is 28 and their difference is 4 what are the numbers?

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iuliaelisa15 iuliaelisa15

29-06-2018

a+b = 28
a-b = 4
_______ +

2×a =32 ⇒ a=32:2 ⇒ a=16
⇒ b=28-16
⇒ b=12

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