Question

Tìm x , biết : x+15%*x=115

Answer 1

x+15%.x=115

x+3/20.x=115

x.(1+3/20)=115

x.23/20=115

=>x=115:23/20

x=100

Answer 2

\(x+15\%\times x=115\)

\(x\times1+\frac{1}{4}\times x=115\)

     \(x\times\left(1+\frac{1}{4}\right)=115\)

                \(x\times\frac{5}{4}=115\)

                        \(x=115:\frac{5}{4}\)

                        \(x=92\)

Answer 3

\(x+15\%\times x=115\)

 \(x+\frac{3}{20}\times x=115\)

\(x\times\left(\frac{3}{20}+1\right)=115\)

\(x\times\frac{23}{20}=115\)

         \(x=115:\frac{23}{20}\)

         \(x=100\)

Answer 4

\(x+15\%\times x=115\)

\(x+\frac{3}{20}\times x=115\)

\(x\times\left(\frac{3}{20}+1\right)=115\)

\(x\times\frac{23}{20}=115\)

\(x=115:\frac{23}{20}\)

\(x=100\)

Answer 5

X = 100 đúng đó chắc chắn luôn 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%

Answer 6

\(x+15\%\times x=115\)

\(x+\frac{3}{20}\times x=115\)

\(x\times\left(\frac{3}{20}+1\right)=115\)

\(x\times\frac{23}{20}=115\)

\(x=115\div\frac{23}{20}\)

\(x=100\)