Question

simultaneous equation in variable DX=65 dy =91 d=13 then y?

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Answer 1

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Q1)simultaneous equation in variable Dx=65 and Dy=91, d=13 then y=??

$\: \bullet \underline{ \boxed{ \bf{answer}}}$

$\: \implies \displaystyle \tt{by \: crammers \: rule}$

$\implies\displaystyle\tt{x=\dfrac{D_x}{D} \: and \: y=\dfrac{D_y}{D}}$

$\implies\displaystyle\tt{x=\dfrac{65}{13}=\cancel\dfrac{65}{13}=5}$

$\implies\displaystyle\tt{y=\dfrac{91}{13}=\cancel\dfrac{91}{13}=7}$

$\: \\ \implies \boxed{\displaystyle \tt{the \: value \: of \: x \: and \: y \: is \: 5 \: and \: 7}}$