Question

For the simultaneous equation in x and y if Dx = 81,
Dy = -99 and D = 9 then find the value of y
​

Answer 1

SOLUTION

GIVEN

For the simultaneous equation in x and y

$\displaystyle\sf{D_x = 81, D_y = - 99, D = 9}$

TO DETERMINE

The value of y

EVALUATION

Here it is given that For the simultaneous equation in x and y

$\displaystyle\sf{D_x = 81, D_y = - 99, D = 9}$

Hence

$\displaystyle\sf{ x= \frac{D_x}{D} = \frac{81}{9} = 9 }$

$\displaystyle\sf{ y= \frac{D_y}{D} = - \frac{99}{9} = - 11 }$

FINAL ANSWER

Hence the required value of y = - 11

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