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Question Number 100954 by bobhans last updated on 29/Jun/20
{12x−y+y=1y2x−y=−6
Commented by Dwaipayan Shikari last updated on 29/Jun/20
−6y=12x−y→(1)−6y+y=1⇒t2−t−6=0⇒t=3or−2{supposey=t}−63=12x−9⇒−4x+18=1⇒x=174{x=174y=9
Answered by ajfour last updated on 29/Jun/20
s=12x−y,t=ys+t=1,st=−6⇒t>0,s<0s,t=12±14+6t=12+52=3,s=−2⇒y=t2=9,s=12x−y=12x−9=−2⇒2x=9−12⇒x=174.
Answered by john santu last updated on 29/Jun/20
⇒12x−y=−6y(1)⇒−6y+y=1;(y)2−y−6=0(y−3)(y+2)=0;y=3y=9⇒12x−9=−2;2x−9=−122x=172,x=174
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