Two numbers differ by 3.The sum of twice the smaller number and thrice the great number is 9.Find the number.
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Let :
- 1st number be x
- 2nd number be y
Given :
- x-y = 3 { assuming x is larger }
- 3x + 2y = 9
Solution :
x - y = 3
x = y + 3 ........ equation 1
3x + 2y = 9
putting value of x from equation 1 into above equation, we get;
=> 3(y+3) + 2y = 9
=> 3y + 9 + 2y = 9
=> 5y = 9-9
=> 5y = 0
=> y = 0
putting value of y in equation 1, we get;
x = y + 3
x = 0+3
x = 3
ANSWER :
- x = 3
- y = 0
Verification :
- 3 - 0 = 0 that is x - y = 3
- 3(3)+2(0) = 9+0 = 9 ,that means 3x +2y = 9
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