Question

Determinați nr x din 1/2=x+3/10 repede

Answer 1

Răspuns:

$x = \frac{2}{10} =\frac{1}{5}$

Explicație pas cu pas:

Ce se cere:

Aflati x din urmatoarea relatie:  $\frac{1}{2} = x + \frac{3}{10}$  .

Aducem la acelasi numitor, acesta este 10.

$\frac{^{5)}1}{2} = x + \frac{3}{10}$

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

$x = \frac{5}{10} - \frac{3}{10} =\frac{2}{10}$

$x = \frac{2}{10} =\frac{1}{5}$

Succes!

Answer 2

Salutare!

$\bf \dfrac{1}{2} =x+ \dfrac{3}{10}$

$\bf \dfrac{1}{2}-\dfrac{3}{10} = x$

$\bf \dfrac{1\cdot5}{2\cdot5}-\dfrac{3}{10} = x$

$\bf \dfrac{5}{10}-\dfrac{3}{10} = x$

$\bf \dfrac{5-3}{10} = x$

$\bf \dfrac{2}{10} = x$

$\bf \dfrac{\not2}{\not10} = x$

$\boxed{\bf x = \dfrac{1}{5} }$  sau  $\boxed{\bf x =0,2 }$  sau $\boxed{\bf x = 5^{-1} }$