n : 3 = 12 : 18
You asked:
Solve \(n : 3=12 : 18\) for the variable \(n\).
MathBot Answer:
$$\begin{aligned}n &= 2\end{aligned}$$
Express both ratios as fractions. \[\frac{n}{3} = \frac{12}{18}\]
Cross-multiply and solve for the unknown. $$\begin{aligned}\frac{n}{3} &= \frac{12}{18} \\ 18 n &= 36 \\ n &&= 2 \end{aligned}$$