Answer:
A)x+y = 60Step-by-step explanation:
Time spend on freehand exercise is y and that on trademill is x.
As per the give problem
A) pair of linear equations
x+y = 60 ....(1)
x = 30 + y .....(2)
B)
Using (1) and (2)
30+y +y = 60
2y = 60-30 = 30
y = 15 minutes
And x = 30+y = 30+15 = 45 minutes
Time spend on freehand exercise is 15 minutes and on trademill is 45 minutes.
C) No it's is not possible
As per the given problem
x + y = 60 ....(3)
x = 30 + y ....(4)
x = 40 minutes....(5)
Using (3) and (5) y= 60-x = 60-40 = 20 minutes
And using (4) and (5)
40 = 30+y
y = 10 minutes
We have two different values of y which is not possible.