Which property can be used to show that if 3a = 4b, then 4b = 3a?

How do i work this problem out using the equation a=pe^rt

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

Which two transformations are applied to pentagon abcde to create a'b'c'd'e'? (4 points) translated according to the rule (x, y) ? (x + 8, y + 2) and reflected across the x-axis translated according to the rule (x, y) ? (x + 2, y + 8) and reflected across the y-axis translated according to the rule (x, y) ? (x + 8, y + 2) and reflected across the y-axis translated according to the rule (x, y) ? (x + 2, y + 8) and reflected across the x-axis