Whats the common denominator of 3/4 and 5/6​

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

What is the solution to the equation below? 3/x-2+6=square root x-2 +8

Solve 13 + w/7= -18 (w/7 is a fraction)