Question

X+20%+X=7,2

Answer 1

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

X + X +\(\frac{1}{5}\) =7,2 ( phép cộng có tính chất giao hoán)

X x2 +\(\frac{1}{5}\) =7,2

X x2 =7,2 - \(\frac{1}{5}\)

X x2 =7

X = 7:2

X =3,5

Answer 2

\(x+20\%+x=7,2\)

\(\left(x+x\right)+0,2=7,2\)

\(2x=7,2-0,2\)

\(2x=7\)

\(x=7:2\)

\(x=3,5\)

Answer 3

thanks

Answer 4

thanks