Question

Tìm x biết:

2x + 3x = 5 mũ 6 ÷ 25

Answer 1

2x + 3x = \(5^6\): 25

5x = \(5^4\)

5x = 625

x = 625 : 5

x = 125

Answer 2

\(2x+3x=5^6:25\)

\(2x+3x=5^6:5^2\)

\(2x+3x=5^4\)

\(\Leftrightarrow x.5=5^4\)

\(\Leftrightarrow x=5^3\)

Answer 3

2x+3x=\(5^6\):25

2x+3x =15625 : 25

2x+3x= 625

x(2+3)=625

\(x\)*5=625

\(x\)    =625 :5

 \(x\)   =125