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raleung2

  • 2 years ago

The sum of 2 numbers is 18. The difference between 3 times the smaller number and the larger number is 10. Define variables and formulate a system of equations from this situation. What is the larger number? work please? :D

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  1. S
    • 2 years ago
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    x + y = 18 3x - y = 10 sum the two equations: 4x = 28 x = 7 now plug in x = 7 back into the two equations : 7 + y = 18 3(7) - y = 10 you get y = 11 So the smaller number is 7, larger number is 11

  2. raleung2
    • 2 years ago
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    thanks

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