Convert the fractions into decimals:
7/8 = 0.875
11/10 = 1.1
0.875 is 0.125 away from 1
and 1.1 is only 0.1 away from 1
So 11/10 is closer to whole number 1
Since they are like terms, add -2x and -4x which gets you -6x
-7 - 6x = 17
Cancel out -7 and add 7 to 17
-6x = 24
24 / -6x = -4x
X = -4
0.60 km which I got from https://quizizz.com