Question

plse check if i have done right or wrong

Answer 1

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]

Answer 2

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

Answer 3

so can u plse tell me how to solve this sum

Answer 4

x + y = 80
-
x - y/2 = 68


(x-x) + (y - -y/2) = (80-68)

0 + (y + y/2) = 12

3y/2 = 12

Answer 5

y=8

Answer 6

and x= 72

Answer 7

yes. and this makes a lot of sense since 72 - (8/2) is the 68 it should be

Answer 8

@Euler271
thanks

Answer 9

glad i could help :)