Let's solve in $ℝ$: $6x=72$

ⓘ Both sides are divided by $6$

$x=\frac{72}{6}$

ⓘ We simplify the fraction by dividing the numerator and the denominator by $6$, their greatest common divisor: $\frac{72}{6}$ = $12$

▶Solution obtained: $x=12$