Question

Tìm x:

1500 : [(30x + 40) : x] = 30

(2x - 15)⁵ = (2x - 15)³

3^{2x + 2} = 9^{x + 3}

Answer 1

1500: [(30x + 40) : x]=30

=>(30x + 40): x = 1500 : 30

=>30x : x+ 40:x=50

=> 30 + 40 :x=50

=> 40 :x=50-30

=> 40:x=20

=>x=40:20

=>x=2

 

Answer 2

 : [(30x + 40) : x] = 30(2x - 15)5 = (2x - 15)3

=>(30x+40):x=1500 : 30=50

40:x = 50-30

40:x=20

x=2