Question

pls answer in step by step​

Answer 1

Answer:

I)3^x-4/3^-5=3^4

or,3^x-5+5=3^4

or,3^x=3^4(-5 and -+5 are cut)

or,x=4(3and3 are cut)

:.x=4

II)(2/5)^3x+7=(2/5)^10

or,3x+7=10(2/5 and 2/5 are cut)

or,3x=10-7

or,3x=3

or,x=3/3

or,x=1(3 and 3 are cut)

:.x=1