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Y-5/1-5=X-2/-2-2
Y-5/-4=X-2/-4
-4Y+20=-4X+8
-4Y= -4X+8-20
-4Y= -4X-12
2. 2X-3Y=-18 => 4X-6Y=-36
4X-Y= -16 4X-Y= -16
4X-6Y=-36
4X-Y= -16
__________-
-5Y= -20
Y=4
X= 3
5X+2Y
=5.3+2.4
=15+8=23