Ruduce this

$x = \dfrac{141}{3} = \boxed{47}$

At the end there is a 1 and the only last number from the answer multiplied by three is 47.

3x=141

$\frac{3x}{3}$ = $\frac{141}{3}$ (divide both sides by 3)

x= $\frac{141}{3}$ (left equals x)

x=47 (right equals 47.)