Notice that 243 is 3 to the 5th power.
So your equation says:
3x = 35
I'd say that 'x' is probably 5.
X=81
3
The number is -3
b = -3
The letter a is a variable. "To the fifth" means to the fifth power, or a*a*a*a*a. If a equals 3, "a to the fifth" equals 243.
3x81=243
Yes, 243 divided by 3 equals 81.
It is: 243 to the power of 1/5 = 3 because 3*3*3*3*3 = 243
243
243 times 3 equals 729.
3x3x3x3x3=243
243 duh who made this question
Negative 3 raised to the power of 5 is equal to -243.