Question

a)The sum of two numbers is 40. Taking the numbers as x and y from an equation b)Their difference is 10 . Using this idea from another equation c)Find the numbers​

Answer 1

Answer:

x=10 y=30

hope it helps!!

Answer 2

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X + Y = 40 ( Given ) — Equation 1

X – Y = 10 ( Given ) — Equation 2

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Using cancellation method, we get —

( X + Y = 40 ) – ( X – Y = 10 )

Or, ( X + Y = 40 ) – X + Y = – 10

Or, X – X + Y + Y = 40 – 10

Or, 2 Y = 30

Or, Y = 30 / 2

Or, Y = 15

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$\frac { \binom{ \: x + y = 40}{ - (x - y = 10)} }{2y = 30} \\ \\ or,y = 15$

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Now, putting value of Y in ( equation 1) —

X + Y = 40

Or, X + 15 = 40

Or, X = 40 – 15

Or, X = 25

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Hence, X = 25 and Y = 15.

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