Question

2 x - 1 = 5⁹⁸ : 5⁹⁶

Answer 1

Giải:

\(2x-1=5^{98}:5^{96}\)

\(\Leftrightarrow2x-1=5^{98-96}\)

\(\Leftrightarrow2x-1=5^2\)

\(\Leftrightarrow2x-1=25\)

\(\Leftrightarrow2x=26\)

\(\Leftrightarrow x=13\)

Vậy ...

Answer 2

\(2x-1=5^{98}:5^{96}\)

\(2x-1=5^2\)

\(2x-1=25\)

\(2x=25+1\)

\(2x=26\)

\(x=26:2\)

\(x=13\)

Answer 3

2 x - 1 = 5^2

2x - 1 = 25

2x =25+1

2x=26

x=26:2

x=13