Question

the sum of two rational number is -3. lf one of the -15 by 7 find the other one​

Answer 1

• Let other number be M.

» The sum of two rational numbers is -3. If one of the number is -15/7.

A.T.Q.

=> -15/7 + M = - 3

=> (-15 + 7M)/7 = - 3

=> - 15 + 7M = - 3(7)

=> - 15 + 7M = - 21

=> 7M = - 21 + 15

=> 7M = - 6

=> M = - 6/7

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$\textbf{Other number = -n6/7}$

_________ [ ANSWER ]

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✡ VERIFICATION :

From above calculations we have M = -6/7

Put value of M in this equation :

-15/7 + M = - 3

=> -15/7 + (-6/7) = - 3

=> - 15/7 - 6/7 = - 3

=> (- 15 - 6)/7 = - 3

=> -21/7 = - 3

=> - 3 = - 3

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Answer 2

$\huge\textbf{Answer:-}$

Let x be the other number

Two rational numbers is -3.

-15/7

-15/7 + x = - 3

(-15 + 7x)/7 = - 3

- 15 + 7x = - 3(7)

- 15 + 7x = - 21

7x = - 21 + 15

7x = - 6

x = - 6/7

Therefore the other number is -6/7 and value of x is -6/7