Question

 Tìm x, biết:

X+20%x X =7,2

Answer 1

X + 20% x X = 7,2

X x 1 + X x 1/5 = 7,2

X x (1 + 1/5) = 7,2

X x 6/5 = 7,2

X = 7,2 : 6/5

X = 7,2 x 5 / 6

X = 6

Answer 2

X + 20%x X=7,2

=> X+ \(\frac{1}{5}\)x X=7,2

=> X x( 1+\(\frac{1}{5}\))=7,2

=> X x \(\frac{6}{5}\)=7,2

=> X=6

 

Answer 3

thank các bn nha!!! ^_^

Answer 4

X + 20% x X = 7,2

X x 1 + 0,2 x X =7,2

X x (1 + 0,2) = 7,2

X x 1,2 = 7,2

X = 7,2 : 1,2

X = 6