3/7=x/49 a. 15 b. 18 c. 21 d. 24

Answer 1

To solve the equation \( \frac{3}{7} = \frac{x}{49} \), you can use cross-multiplication.

1. Cross-multiply to get: \[ 3 \cdot 49 = 7 \cdot x \]

2. Calculate \( 3 \cdot 49 \): \[ 3 \cdot 49 = 147 \]

3. Now you have: \[ 147 = 7x \]

4. To solve for \( x \), divide both sides by 7: \[ x = \frac{147}{7} = 21 \]

So \( x = 21 \).

The answer is c. 21.