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Question Number 132119 by Hamid52 last updated on 11/Feb/21
 { (( x+ y= )),(( x− y= )) :}
$$\begin{cases}{ {x}+ {y}= }\\{ {x}− {y}= }\end{cases} \\ $$$$ \\ $$
Answered by Raxreedoroid last updated on 11/Feb/21
 =3   =7   =5   =8  3x+7x+5y−5y=8+7  x=1.5  (4.5)+5y=8  y=((3.5)/5)=(7/(10))  x=( / ),y=( /(  ))
$$ =\mathrm{3} \\ $$$$ =\mathrm{7} \\ $$$$ =\mathrm{5} \\ $$$$ =\mathrm{8} \\ $$$$\mathrm{3}{x}+\mathrm{7}{x}+\mathrm{5}{y}−\mathrm{5}{y}=\mathrm{8}+\mathrm{7} \\ $$$${x}=\mathrm{1}.\mathrm{5} \\ $$$$\left(\mathrm{4}.\mathrm{5}\right)+\mathrm{5}{y}=\mathrm{8} \\ $$$${y}=\frac{\mathrm{3}.\mathrm{5}}{\mathrm{5}}=\frac{\mathrm{7}}{\mathrm{10}} \\ $$$${x}=\frac{ }{ },{y}=\frac{ }{ } \\ $$

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