Question

Tìm x:

a, 3x . 6 = 5x + 2

b, - 12 + x = 5x - 20

c, 7 . ( x - 3 ) - 5 . ( 3 - 2 ) = 11x . 5

Answer 1

a)18x=5x+2

=>13x=2

=>x=2/13

Answer 2

a) 3x.6 = 5x + 2

=> 18x = 5x + 2

=> 18x - 5x = 2

=> 13x = 2 

=> x = 2/13

b) -12 + x = 5x - 20

=> x - 5x = -20 + 12 

=> -4x = -8

=> x = 2

c) 7.(x - 3) - 5.(3 - 2) = 11x.5

=> 7x - 21 - 5.1 = 55x

=> 7x - (21 + 5) = 55x

=> 7x - 26 = 55x

=> 7x - 55x = 26

=> -48x = 26

=> x = -13/24

Answer 3

a)x=2/3

b)x=2

c)x=-13/24

tick mk nha Mạc Thị Thu Hiền và các bạn