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.