Question

1) 11^Log11(log5 125)
2) log2(x-1)+log2 5=log2 15

Answer 1

1)11^log11(log5 125)=log5 5^3=3Log5 5=3
2)log2(x-1)+log2 5=log2 15,
log2 5(x-1)=log2 15.
5(x-1)=15
x-1=3
x=4