1. 2.
1/6 x X - 3/8 = 1/4 1/3 + 2/3 : X = -7
1/6 x X =1/4+3/8 2/3 : X =-7 - 1/3
1/6 x X = 5/8 2/3 : X =-22/3
X=5/8 : 1/6 X=2/3 : -22/3
X=15/4 X=-1/11
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3. 4.
2/3 x X + 1/4 = 7/12 3/4 + 1/4 : x= -3
2/3 x X =7/12 - 1/4 1/4 : x=-3 : 3/4
2/3 x X =1/3 1/4 : x=-4
X=1/3 : 2/3 X=1/4 : -4
X=1/2 X=-1/16
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