Find the value of two numbers if their sum is 12 and thier difference is 4
1 answer:
X + y = 12
x - y = 4
(12 - 4) : 2 = 4
4 + 4 = 8
x = 8
y = 4
-----------------------
8 + 4 = 12
8 - 4 = 4
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