When solving the problem 7^x+2 =7^3x-8 , your friend does the following
7(x)+2=7(3x)-8
7x+2=21x-8
10=14x
x=5/7
Was this correct?
a. Yes, this is correct. No error was made
b. Both sides should be divided by 7 instead of multiplied by 7
c. The 7 needs to be distributed across all terms when solving
d. When the bases are the same, then we can set the exponents equal to each other and solve that equation