To combine like terms and single out one term to take it easier to solve, the 6x was moved to the other side to combine like terms.
Subtracting 6x from 10x which is 4x
$58.08 I think that’s what I got when I typed it in the calculator
Between 10 and 11, all the others would be to much or to little
She walks 6/5 of a mile in 1 hour
So, she walks 1.2 miles per hour