Question

Considering the following option 2/7 = 12/X Use Cross products to write the Equation:2x = 84 What Is The Value of x?

Answer 1

Answer:

multiply all that

Step-by-step explanation:

Answer 2

Answer:

  42

Step-by-step explanation:

For the proportion ...

  $\dfrac{2}{7}=\dfrac{12}{x}$

Form the "cross products" by multiplying both sides of the equation by 7x (the product of the denominators. This gives you ...

  $7x\cdot\dfrac{2}{7}=7x\cdot\dfrac{12}{x}\\\\2\cdot x=7\cdot 12\qquad\text{each numerator \times the opposite denominator}\\\\2x=84$

After you have formed the "cross products", divide by the coefficient of x:

  x = 84/2 = 42

The value of x is 42.