Question

What is the value of x in the equation -6/7 = -x/84? A. –98 B. –72 C. 72 D. 98

Answer 1

Use cross multiplication: 
$\frac{-6}{7} = \frac{-x}{84}$

$(-6)*(84)=(-x)*(7)$

$-504=-7x$

Divide both sides by -7 to find x: 
$-504/-7=-7x/-7$

Final answer: x=72 (C)

Answer 2

The answer i think is 72