Question

tìm x:

a, X+20%xX=7,2

b,40%xX+X+20%=7,2

giúp mk nhé mai nộp rùi

Answer 1

x(100%+20%)=7.2

x120%=720%

x=720%:120%

x=6

vậy////////

(40%+100%)x+20%=720%

140%x=720%-20%

140%x=700%

x=720%:140%

x=36/7

vậy x=/////////////

Answer 2

x﴾100%+20%﴿

=7.2 x120%

=720% x

=720%:120%

x=6