Question

quanto é 3X/5- 1/2=X- 2/5?

Answer 1

Resposta:

$x=-\frac{1}{4}$

Explicação passo a passo:

$\frac{3x}{5}-\frac{1}{2}+\frac{1}{2}=x-\frac{2}{5}+\frac{1}{2}$

$\frac{3x}{5}=x+\frac{1}{10}$

$\frac{3x}{5}\cdot \:5=x\cdot \:5+\frac{1}{10}\cdot \:5$

$3x=x\cdot \:5+\frac{1}{2}$

$3x-x\cdot \:5=x\cdot \:5+\frac{1}{2}-x\cdot \:5$

$-2x=\frac{1}{2}$

$\frac{-2x}{-2}=\frac{\frac{1}{2}}{-2}$

$x=-\frac{1}{4}$ <--