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The sum of two numbers is equal to 11 and the difference is 19. What are the two numbers?

User Adam Goss
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1 Answer

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\bold{\huge{\pink{\underline{ Solution }}}}

We have given in the question that,

  • The sum of 2 numbers is equal to 11
  • The difference between two numbers is 19 .


\bold{\underline{ To \: Find }}

  • We have to find the value of x and y.


\bold{\underline{ Let's \: Begin }}

Let the two numbers be x and y

According to the question,


\sf{ x + y = 11......eq(1) }


\sf{ x - y = 19......eq(2) }

Solving eq( 1 ) we get :-


\sf{ x + y = 11 }


\sf{ x = 11 - y ......eq(3 ) }

Subsituting eq(3 ) in eq(2) :-


\sf{ x - y = 19 }


\sf{ ( 11 - y) - y = 19 }


\sf{ 11 - y - y = 19 }


\sf{ 11 - 2y = 19 }


\sf{ - 2y = 19 - 11 }


\sf{ - 2y = 8}


\sf{ y = 8/(-2) }


\sf{ y = - 4 }


\sf{\red{Thus ,\: the\: value\: of \: y = -4}}

Now, Subsitute the value of y in eq( 3 ) :-


\sf{ x = 11 - y }


\sf{ x = 11 - (-4 ) }


\sf{ x = 11 + 4 }


\sf{ x = 15 }

Hence, The value of x and y are 15 and (-4) .

User Jignesh Fadadu
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