Part a: if (72)x = 1, what is the value of x? explain your answer. part b: if (70)x = 1, what are the possible values of x? explain your answer.
answer will friend and give 15 points

Just tell me how to set up the equation.

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.