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20x+12y= 56
--------------------- +
50x = 50
x = 1
5x+3y = 14
5+3y= 14
3y= 9
y= 3
(1,3)
5x + 3y = 14 (x2) 10x +6y = 28
-10y= -30
y = 3
10x - 4y =-2
10x -4(3) = -2
10 x - 12 = -2
10 x = 10
x = 1