Question

Daca la dublul unui numar adaugam $\frac{1}{5}$,obtinem - $\frac{ 4}{3}$.Determinati numarul ....

Answer 1

2x+$\frac{1}{5} =- \frac{4}{3}$
2x=$\frac{-4}{3} - \frac{1}{5}$
2x=$\frac{-23}{15}$
30x=-23
x=$\frac{-23}{30}$

Answer 2

Fie x numarul deci
2x+1/5=4/3 2x+1=-4/3x5
2a+1=20/3-1
2a=20/2
2a=10=>a=5(p's nu's sigur)