Question

X*1,2+X*1,8=45

 

Answer 1

       x*1,2+x*1,8=45

<=> x*( 1,2+1,8)=45

<=>3*x=45

<=> x=45:3=15

Vậy x=15

Answer 2

\(x\times1,2+x\times1,8=45\)

\(x\times\left(1,2+1,8\right)=45\)

\(x\times3=45\)

\(x=45\div3=15\)

Chúc bạn học tốt ^^!!!

Answer 3

\(x\times\left(1,2+1,8\right)\)\(=45\)

                           \(x\times3=45\)

                                    \(x=45\div3\)

                                    \(x=15\)
\(\text{Vậy x = 15 Chúc bạn hok tốt !}\)

Answer 4

\(x.\frac{1}{2}+x.\frac{1}{8}=45\)

\(x.\left(\frac{1}{2}+\frac{1}{8}\right)=45\)

\(x.\frac{5}{8}=45\)

\(x=72\)

Answer 5

nhầm bn == 

\(x.1,2+x.1,8=45\)

\(x.\left(1,2+1,8\right)=45\)

\(x.3=45\)

\(x=15\)