# Find two numbers whose sum is 17 and whose difference is 1

2
by Aranconfaith
How to solve

2015-08-28T20:42:59+08:00

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9 and 8 is the answer 9+8=17; 9-8=1
Nine more than the sum of twice 25 and 15 is what number
9+2x+y=0
9+2(x+y)=25 9+2(4+4)=25 9+2(8)=25 9+16=25 25=25 and 9+2(x+y)=15 9+2(1+2)=15 9+2(3)=15 9+6=15 15=15 THE ANSWER IS 4 & 4 FOR 25 AND 1 &2 FOR 15
2015-08-28T20:52:44+08:00

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Let x be the first number
y be the second number
x + y = 17
x -  y = 1
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2y = 16     ( subtract the equations )
y = 8
x + 8 = 17
x = 17 - 8
x = 9
Therefore, the two numbers are 8 and 9.