X+X:0,5+X:0,25+X:0,125=5

X+X x 2+ X x 4 + X x 8 =5

X x (1+2+4+8)=5

X x 15 =5

X=5 : 15

X=\(\frac{1}{3}\)

Vậy X=\(\frac{1}{3}\)

x + x : 0,5 + x : 0,25 + x : 0,125 = 5

=> x + x . 2 + x . 4 + x . 8 = 5

=> x(1 + 2 + 4 + 8) = 5

=> x.15 = 5

=> x = 5 : 15

=> x = 1/3

#)Giải :

\(x+x:0,5+x:0,25+x:0,125=5\)

\(x+x.2+x.4+x.8=5\)

\(x.\left(1+2+4+8\right)=5\)

\(x.15=5\)

\(x=5:15\)

\(x=\frac{5}{15}=\frac{1}{3}\)

#)Chú ý : Dấu ''.'' là dấu ''x'' nha, cấp hai thì viết như v

           #~Will~be~Pens~#

    X+X:0,5+X:0,25+X:0,125=5

=>           X+Xx2+Xx4+Xx8=5

            Xx1+Xx2+Xx4+Xx8=5

                     Xx(1+2+4+8)=5

                                Xx15=5

                                    X =5:15

                                    X=1/3

                               Vậy X=1/3

các bn nhớ k cho mk nha

x + x : 0,5 + x : 0,25 + x : 0,125 = 5

x + x . 2 + x . 4 + x . 8 = 5

x . ( 1 + 2 + 4 + 8 ) = 5

x . 15 = 5

x = 5 : 15

x = 1/3

\(x+x:0,5+x:0,25+x:0,125=5\)

\(\Leftrightarrow x+x.\frac{1}{2}+x.\frac{1}{4}+x.\frac{1}{8}=5\)

\(\Leftrightarrow x.\left(1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}\right)=5\)

\(\Leftrightarrow x.\frac{15}{8}=5\Rightarrow x=5:\frac{15}{8}=\frac{8}{3}.\)

\(x+x\div0,5+x\div0,25+x\div0,125=5\)

\(x+x\times2+x\times4+x\times8=5\)

\(x\times\left(1+2+4+8\right)=5\)

\(x\times15=5\)

\(x=5\div15\)

\(x=\frac{1}{3}\)

Vậy \(x=\frac{1}{3}\)

\(x+x:0,5+x:0,25+x:0,125=5\)

\(x\times1+x\times\frac{1}{2}+x\times\frac{1}{4}+x\times\frac{1}{8}=5\)

\(x\times\left(1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}\right)=5\)

\(x\times\frac{15}{8}=5\)

\(x=5:\frac{15}{8}\)

\(x=\frac{8}{3}\)

~ Hok tốt ~