Question

[bui thu hang]

bài 1:tìm x

a)75;(x-18)=5 mũ 2

b)740:(x-10)=10 mũ 2 -2 x13

c)(2x -5) mũ 3 =8

d)(15-6x)x3 mũ 5 =3 mũ 6

Answer 1

[Đặng Thanh Tâm]

a) 75 : ( x - 18 ) = 5² = 25

=>       x - 18 = 3

=>       x = 21

b) 740 : ( x - 10 ) = 10² - 2 x 13

    740 : ( x - 10 ) = 100 - 26 = 74

=>           x - 10 = 10

=>            x = 20

c) ( 2x - 5 )³ = 8 = 2³

=>  2x - 5 = 2

=>  2x = 7

=>     x= 7/2

d) ( 15 - 6x ) x 3⁵ = 3⁶

=> ( 15 - 6x ) = 3⁶ : 3⁵ = 3

=>   6x = 12

=>     x = 2

Answer 2

[Quảng Phắn]

1+1= ??????