Nisha did the work below to solve an equation.

step 1 7 b + 3.2 b minus 5 = 18.92
step 2 10.2 b minus 5 = 18.92
step 3 5.2 b = 18.92
step 4 b = 3.64

in which step did nisha make her first error?
step 1
step 2
step 3
step 4

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then,the two had the same amount of money. how much money did each have originally?