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x-y-1-0-x-y-1-0-2x-3y-




Question Number 149140 by mathdanisur last updated on 03/Aug/21
 { ((∣x∣ + y - 1 = 0)),((x - y - 1 = 0)) :}   ⇒  2x - 3y = ?
$$\begin{cases}{\mid{x}\mid\:+\:{y}\:-\:\mathrm{1}\:=\:\mathrm{0}}\\{{x}\:-\:{y}\:-\:\mathrm{1}\:=\:\mathrm{0}}\end{cases}\:\:\:\Rightarrow\:\:\mathrm{2}{x}\:-\:\mathrm{3}{y}\:=\:? \\ $$
Commented by liberty last updated on 03/Aug/21
y= x−1  ⇒∣x∣+x−2=0  case(1) x<0 ⇒−x+x−2=0 ,no solution  case(2)x>0⇒x+x−2=0    { ((x=1)),((y=0)) :} ⇒2x−3y=2
$$\mathrm{y}=\:\mathrm{x}−\mathrm{1} \\ $$$$\Rightarrow\mid\mathrm{x}\mid+\mathrm{x}−\mathrm{2}=\mathrm{0} \\ $$$$\mathrm{case}\left(\mathrm{1}\right)\:\mathrm{x}<\mathrm{0}\:\Rightarrow−\mathrm{x}+\mathrm{x}−\mathrm{2}=\mathrm{0}\:,\mathrm{no}\:\mathrm{solution} \\ $$$$\mathrm{case}\left(\mathrm{2}\right)\mathrm{x}>\mathrm{0}\Rightarrow\mathrm{x}+\mathrm{x}−\mathrm{2}=\mathrm{0} \\ $$$$\:\begin{cases}{\mathrm{x}=\mathrm{1}}\\{\mathrm{y}=\mathrm{0}}\end{cases}\:\Rightarrow\mathrm{2x}−\mathrm{3y}=\mathrm{2} \\ $$
Commented by mathdanisur last updated on 03/Aug/21
Thank You Ser
$${Thank}\:{You}\:{Ser} \\ $$

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