anonymous
  • anonymous
plse check if i have done right or wrong
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
you made a mistake when subtracting 2 from 1; there is a double negative: x + y = 80 (1) x - y/2 = 68 (2) (1) - (2) 3y/2 = 12 everything besides that would be correct [plugging the right y value in]
anonymous
  • anonymous
btw , i knew to look deep for a mistake from reading the solution. i noticed that 56 didn't make sense since he got 68 marks
anonymous
  • anonymous
so can u plse tell me how to solve this sum

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anonymous
  • anonymous
x + y = 80 - x - y/2 = 68 (x-x) + (y - -y/2) = (80-68) 0 + (y + y/2) = 12 3y/2 = 12
anonymous
  • anonymous
y=8
anonymous
  • anonymous
and x= 72
anonymous
  • anonymous
yes. and this makes a lot of sense since 72 - (8/2) is the 68 it should be
anonymous
  • anonymous
@Euler271 thanks
anonymous
  • anonymous
glad i could help :)

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