TCS Company Numerical Ability Algebra

My paper has different puzzle that is 20 cake pieces must be divided among 3 people mother, father and sons that is mother eats 2 pieces, father eats 3 and son eats half so what will be the quantity to choose

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2x+3x+0.5x=20
by trail and error or by option
x=14 0.5*14=7 ( son)
x=1 3*1=3 (father)
x=5 2*5=10 (mother)
so total 7+3+10=20
pieces son=14,father=1,mother=5
10 years agoHelpfull: Yes(5) No(0)

14 pieces to son ,5pieces to mother& 1piece to father
10 years agoHelpfull: Yes(2) No(8)
plzz explain @SIDDU..
10 years agoHelpfull: Yes(1) No(0)
please explain?
10 years agoHelpfull: Yes(0) No(0)
plzee explain..??
10 years agoHelpfull: Yes(0) No(0)
mother =8 pieces
father=12 pieces
child=2 pieces
10 years agoHelpfull: Yes(0) No(2)

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Related to direction & distance: a person is travelling in so and so direction, eg: 5km North then 5km East then 10km North then so and so. Find the distance between original & final positions Man, woman and a boy finish work together in 6 days. Man alone takes 10 days; woman alone takes 24 days then how many days boy alone will take to do that work?