-- I've decided to name the unknown number ' Q ', because I can.
-- The product of 25 and the unknown number is 25 Q .
-- The quotient of that product and 45 is 25 Q/45 .
-- We're told that this quotient is -65 .
25 Q / 45 = -65 .
25 for the first one
(-5-2=-7 -7x-3=21 21+4=25)
220 for the second one
(10x-2=-20 -20+(-2)=-22 -22x-10=220)
Take your original equation and replace the variables with their corresponding variables. As a result, you get the equation
F=9(-6)+2(7)
F=-54+14
F= 40
Answer: Here's your answer mate,
2045.973
Rationalising the denominator is what I would do (figure may imply differently) if x= 9/root 3, then times both the denominator and numerator by Root3, leaving 9*root3/Root3*Root3
This cancels down into 9*Root3/3 because a root*root of the same number= that number
9 times Root 3 all over 3
