11.subtracting 2nd equation from the 1st equation.6x+3y =-126x + 2y =-4- - +____________y = 8putting the value of y=16 in 1st equation.6x +3*8 =-126x =-12-246x = -36x =-6so, x =-6 and y=812.y=2x+11y+x =5rewriting them,y-2x=11y+x=5subtracting 2nd equation from the 1st equation.y - 2x = 11y + x = 5- - -_________-3x = 6x =-2and putting the value of x = -2 in 1st equation...y =2*-2 +11 = -4+11 =7so, x=-2 and y=713. (-1,0)14. (-1,7)
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