Question

1. \\(\frac{7}{5} = \frac{x}{3}\\)\
2. \\(\frac{7}{n} = \frac{8}{7}\\)

Explanation:

Problem 2:

Step1: Cross - multiply the proportion

For the equation $\frac{7}{5}=\frac{x}{3}$, cross - multiplying gives $5\times x = 7\times3$.

Step2: Solve for x

Simplify the right - hand side: $5x = 21$. Then divide both sides by 5, so $x=\frac{21}{5}=4.2$.

Problem 4:

Step1: Cross - multiply the proportion

For the equation $\frac{7}{n}=\frac{8}{7}$, cross - multiplying gives $8\times n=7\times7$.

Step2: Solve for n

Simplify the right - hand side: $8n = 49$. Then divide both sides by 8, so $n=\frac{49}{8}=6.125$.

Answer:

s:
Problem 2: $x = \frac{21}{5}$ (or $4.2$)
Problem 4: $n=\frac{49}{8}$ (or $6.125$)