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The sum of two numbers is 21 the difference between the two numbers is 19 what are the two numbers?
Kwilkey32
Name the two numbers x & y , you can form these equations:
x + y = 21
x - y = 19
Solve the system by substitution:
x - y = 19 --> x = 19 + y
19 + y + y = 21
19 + 2y = 21
2y = 2
y = 1
But, X + y = 21
X + 1 = 21
x = 20
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∙ 13y ago
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