Let's solve in $ℝ$: $5x=25$

ⓘ Both sides are divided by $5$

$x=\frac{25}{5}$

ⓘ We simplify the fraction by dividing the numerator and the denominator by $5$, their greatest common divisor: $\frac{25}{5}$ = $5$

▶Solution obtained: $x=5$