80:10::64
:x
You asked:
Solve \(80 : 10=64 : x\) for the variable \(x\).
MathBot Answer:
$$\begin{aligned}x &= 8\end{aligned}$$
Express both ratios as fractions. \[\frac{80}{10} = \frac{64}{x}\]
Cross-multiply and solve for the unknown. $$\begin{aligned}\frac{80}{10} &= \frac{64}{x} \\ 80 x &= 640 \\ x &&= 8 \end{aligned}$$