Respuesta :

-1/(2*2) = -x7

-1/4 = -x7
-1/4 ÷ -7 = -x7/-7
-1/4 * -1/7 = x          * dividing fractions, the 2nd fraction must be in its reciprocal form.
-1/28 = x                  -7 in fraction for is -7/1 and in reciprocal form is -1/7
                                 * multiply the 1st fraction to the reciprocal of the 2nd fraction
x = -1/28                  * simplify the fraction.