Question

Tìm x :

a) x . x . x = 125

b) ( x + 500 ) = 1000 - 200 .2

c) [( x + 10 ) . 100 ] = 500 + 500 . 10

Answer 1

a) x . x . x = 125

x³ =125

x³ = 5³

= > x = 5

Answer 2

b) ( x + 500 ) = 1000 - 200 . 2

x + 500 = 1000 - 400

x + 500 = 600

x = 600 - 500

x = 100

Answer 3

c) [( x + 10 ) . 100 ] = 500 + 500 . 10

( x + 10 ) . 100 = 500 + 5000

( x + 10 ) . 100 = 5500

x + 10 = 5500 : 100

x + 10 = 55

x = 55 - 10

x = 45

Answer 4