Question

trying to work equation problems and my answer is different from answer in textbook.
12/x = -3 and 24=120/x
1. 12/x(12)= -3(12), x= -36
textbook has -4

2. 24(120)= 120/x(120), x = 2880
textbook has 5

What am I doing wrong???

Answer 1

I will assume that #1 is
12/x = -3

multiply both sides by x
--> 12 = -3x
divide both sides by -3
-4 = x

or

by the "just look at it theorem" ...
What must 12 be divided by to get an answer of -3 ??

#2
24 = 120/x

do the same thing as in #1
24x = 120
x = 120/24 = 5