X/7=4 what number must be multiplied on both sides in order to isolate x on the left side of the equation

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.