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21
b) 3 xty
2x - 3
a x = 24-1
12x + 3y - 12
172x+y=10
X+ y =
X = 2
29
x + 3 M
27
b) s x - y = 1
-
7 X -54
2x + y = 0
X-4
= 3
생​