Question

Y takes 2 hours less than X in covering 30 kilometres. However, if X would double her speed of travel, she would beat Y by 1 hour in covering the same distance. Find the original speed of X. 7 unlock j7​

Answer 1

Answer:

these letters have genders. is this french? XD

y = 3, x = -1  (x,y) (-1,3)

you may say that x can't be negative but it is.

Step-by-step explanation:

y = 2-x for 30km

2x = y+1 for 30km

y = 2-x

2x = y+1

x = 2-y multiply top equation by 2

2x = y+1

2x = 4-2y

2x = y+1

2x+2y = 4

2x-y = 1

y = 4-1 = 3

y = 2-x

3 = 2-x

3-2 = -x

1 = -x

x = -1