Question

tim x

2X =32

9x-1=9

Answer 1

a)2x= 32

x = 32:2

x= 16

b) 9x-1=9

9x= 9+1

9x=10

x= \(\dfrac{10}{9}\)

Answer 2

\(2x=32\)

=>\(x=16\)

\(9x-1=9\)

=>\(9x=10\)

=>\(x=\dfrac{10}{9}\)

Vậy...

Answer 3

Tìm x :

2x = 32

x = 32 : 2

x = 16

Vậy x = 16

9x - 1 = 9

9x = 9 + 1

9x = 10

=> \(x\in\varnothing\)

Answer 4

9^x-1=9

9^x-1=9¹

x-1=1

x=2(thõa mãn x∈N)

vậy x=2