Calcule:
a)x/2 + x/3 = x+7/3
b)x+2/6 + x+1/4 = 6
c)x-2/3 - x+1/4 = 4
d)x-1/2 + x-2/3 = x-3/4
e)2x-3/4 - 1/3 = x+2/2
f)2x-3/4 - 2-x/3 = x-1/3
g)3x-2/4 = 3x+3/8
h)3x+5/4 - 2x-3/3 = 3
i)x+2 (x-2/3) =5x/4
j)2x+1/4 -3 (3-x/2) - 56+x/16