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Mathematics

When the greater of the two numbers increased by 1 divides the sum of the numbers, the result is 32\dfrac{3}{2}. When the difference of these numbers is divided by the smaller, the result is 12\dfrac{1}{2} . Find the numbers.

Linear Equations

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Answer

Let two numbers be x and y, where x is the larger and y is the smaller number.

Given,

When the greater of the two numbers increased by 1 divides the sum of the numbers, the result is 32\dfrac{3}{2}.

x+yx+1=322(x+y)=3(x+1)2x+2y=3x+33x2x=2y3x=2y3………..(1)\therefore \dfrac{x + y}{x + 1} = \dfrac{3}{2} \\[1em] \Rightarrow 2(x + y) = 3(x + 1) \\[1em] \Rightarrow 2x + 2y = 3x + 3 \\[1em] \Rightarrow 3x - 2x = 2y - 3 \\[1em] \Rightarrow x = 2y - 3 ………..(1)

Given,

When the difference of these numbers is divided by the smaller, the result is 12\dfrac{1}{2}.

xyy=122(xy)=y2x2y=y2y+y=2x2x=3yx=3y2.......(2)\therefore \dfrac{x - y}{y} = \dfrac{1}{2} \\[1em] \Rightarrow 2(x - y) = y \\[1em] \Rightarrow 2x - 2y = y \\[1em] \Rightarrow 2y + y = 2x \\[1em] \Rightarrow 2x = 3y \\[1em] \Rightarrow x = \dfrac{3y}{2} …….(2)

From (1) and (2), we get :

2y3=3y22(2y3)=3y4y6=3y4y3y=6y=6.\Rightarrow 2y - 3 = \dfrac{3y}{2} \\[1em] \Rightarrow 2(2y - 3) = 3y \\[1em] \Rightarrow 4y - 6 = 3y \\[1em] \Rightarrow 4y - 3y = 6 \\[1em] \Rightarrow y = 6.

Substituting value of y in equation (2), we get :

x=3×62=182=9.\Rightarrow x = \dfrac{3 \times 6}{2} \\[1em] = \dfrac{18}{2} \\[1em] = 9.

Hence, numbers are 6 and 9.

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