For example, the additive inverse of 12 is –12. The additive inverse of –3 is 3. Formally, the additive inverse of x is –x. Note: The sum of a number and its additive inverse is 0.
10x+32=0
10x=-32
x=-32/10 or -3.2 or -16/5
The answer is 9(3+x)
My work is in the attached image
-3 and -16 multiply to 48 since negatives cancel and add to -19
0.1 decrease in 15 minutes
unit rate is 0.1 / 15 = 0.00667
Temperature is decreasing by 0.00667 degrees Celsius per minute