peter1104 peter1104

23-12-2016
Mathematics

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One number is 2 less than a second number. Twice the second number is 17 less than 5 times the first

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djsdoodle djsdoodle

26-12-2016

x=y-2
2y=5x-17
Substituting for x into the second equation, we find
2y=5(y-2)-17
2y=5y-10-17
-3y=-27
y=9
So x=7
Thus, the two numbers are 7 and 9.

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