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b) 1/4z-1/8z+1/5z= 1/4z=2/8z
2/8z-1/8z= 1/8z + 1/5z= 1/8z * 5/5= 5/40z 1/5z * 8/8= 8/40z
5/40z + 8/40z = 13/40z
c) 0.6g - 3.4g -(-4.4g) + 1.1g = 0.6g - 3.4g + 4.4g + 1.1g = 6.1g - 3.4g= 2.7g
d) 1/2x - 6x + 1/4x -(-1/6x) ; 1/2x= 2/4x -6x * 4/4 = -24x/4
2/4x -24x/4+ 1/4x +1/6x = (2-24+1)/4x + 1/6x = -21x/4 + 1/6x
Convirtiendo en doceavos.
-21x/4 x 3/3= -63/12 1/6x * 2/2= 2/12x
-63x/12 + 2x/12= -61x/12 =