Solve for X choose the best answer

Question

3/7=x/49

15

18

21

24

Answer 1

To solve the equation $\frac{3}{7}=\frac{x}{49}$, we can use cross-multiplication:

$$3\cdot 49=7\cdot x$$

Calculating the left side:

$$3\cdot 49=147$$

Now, equating the two sides gives:

$$147=7x$$

Now, divide both sides by 7 to solve for $x$:

$$x=\frac{147}{7}=21$$

Therefore, the correct answer is:

21