Question

5.3^x-35=4.5²

Answer 1

\(5.3^x-35=4.5^2\)

\(5.3^x=4.25+35\)

\(5.3^x=100+35\)

\(3^x=135:5\)

\(3^x=27\)

\(3^x=3^3\)

\(\Rightarrow x=3\)

vậy \(x=3\)

Answer 2

5.3^x-35=4.5^2

=>5.3^x-35=100

=>5.3^x=100+35

=>5.3^x=135

=>3^x=135:5

=>3^x=27

=>3^x=3^3

=>x=3

 Vậy x = 3

Answer 3

5 . 3^x - 35 = 4 . 5²

5 . 3^x - 35 = 4 . 25

5 . 3^x - 35 = 100

5 . 3^x        = 100 + 35

5 . 3^x        = 135

     3^x        = 135 : 5

     3^x        = 27

     3^x        = 3³

=>  x         = 3

chúc bạn học giỏi ^^