Question

Giúp mik với TwT 

Answer 1

a) \(5x+x=39-3^{11}:3^9\)

\(6x=39-3^2=30\)

\(x=\dfrac{30}{6}=5\)

b) \(7x-x=5^{21}:5^{19}+3.2^2-7^0\)

\(6x=5^2+12-1=36\)

\(x=6\)

c) \(3^x=9=3^2\Rightarrow x=2\)

d) \(4^x=64=4^3\Rightarrow x=3\)

e) \(x^4=16=2^4\Rightarrow x=4\)

f) \(2^x:2^5=1\Leftrightarrow2^{x-5}=1\Leftrightarrow x-5=0x=5\Leftrightarrow\)

Answer 2

a: =>6x=39-9=30

=>x=5

b: =>6x=25+12-1=36

hay x=6

c: =>x=2

d: =>4^x=4³

hay x=3

e: =>x=2 hoặc x=-2

f: =>x-5=0

hay x=5

Answer 3

\(a,5x+x=39-3^2\)

\(6x=39-9\)

\(6x=30\Leftrightarrow x=5\)

\(b,6x=5^2+3.4-1\)

\(6x=25+12-1\)

\(6x=26\Leftrightarrow x=\dfrac{13}{3}\)

c,\(3^x=3^2\Leftrightarrow x=2\)

\(d,4^x=4^3\Leftrightarrow x=3\)

\(e,x=2\)

\(f,2^x-2^5=1=2^0\)

\(\Leftrightarrow x=5\)