Question

64=(4^5x)(16^x^2)

Answer 1

64=4^3, 16=4^2
so

4^3(5x) = 4^s(x+1)

Take the powers
3(5x) = 2 (x+1)
15x = 2x+2
13x=2
x=2/13

Answer 2

yes, i agree exactly with what chosen matt said, just use distributive property