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13-03-2018
Mathematics

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solve equations using addition x+y=5 and x-y=3

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Аноним Аноним

13-03-2018

x + y = 5 ---------- (1)
x - y = 3 ----------- (2)

(1) + (2):
2x = 8
x = 4 ----------- sub into (1)

4 + y = 5
y = 5 - 4
y = 1

Ans: x = 4, y = 1

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