Question

Să se rezolve ecuația:
$\frac{1}{5} \times x + \frac{3}{5} \times x = 16$
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Answer 1

Inmultim ecuatia cu 5 si obtinem:

x+3x=80

4x=80

x=80/4

x=20;

FORTA HXO!

Answer 2

$\frac{1}{5} *x+\frac{3}{5} *x=16\\\\\frac{x}{5}+\frac{3x}{5} =16\\\\\frac{4x}{5}=16\\\\4x=16*5\\\\4x=80 \\\\x=80:4\\\\x=20$

*sau*

$\frac{1}{5}*x +\frac{3}{5}*x=16\\\\\frac{x}{5} +\frac{3x}{5} =16$   (dam factor comun 5)

$\frac{x}{5} +\frac{3x}{5}= \frac{80}{5} |*5\\\\x+3x=80\\\\4x=80\\\\x=80:4\\\\x=20$