1. Find the values of my for which the system is not a Cramer's system.
(a)-2x+m²y=m
x-my=1-m
(b) mx+y=2
x+my=-2
2.solve graphically and shade the unwanted region:
(a) x+y-2>0
(b) x-y+1<or=0
3.solve for real values of x and y:
(a) 5x+3y=12 (b) x-2y=3
7x+2y=19 -3x+6y=-9
4.solve for real numbers values of x and y:
(a) 4y-3x=2 (b) x+2y=40
2y+1=2x 3x=60-y
5.solve simultaneously for real values of x:
(a) x+5>or=2 (b) x+6>10
x-3<7 x-5<or=5
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