Simplifies into
10a-3a
Which equals
7a
5/6x -4 = -2
5/6x = 2
multiply both sides by 6 to get rid of the fraction.
5x = 12
x = 2.4
At the denominator you have
(x-5)×4=4x-20.
But:
2(x+4)/(4(x-5))=(x+4)/2/(x-5)
Hi , the answer is 15 miles per hour because 45 divided by 3 equals 15 , one hour equals to 15 , two hours =30 and three hours =45 , it goes by 15.