For this case we must raise the equation according to the given statement.
Let the variable "x" be the unknown number.
So, three times the number is: 
If to that term is added "6" we have:

The sum of both terms is "12", then:

Thus, the equation is: 
Answer:

Answer:
B. (-9/2, -11/2)
Step-by-step explanation:
-12+3 / 2 = -9/2
-3+-8 / 2 = -11/2
Answer:
15 - 5x = 5 · 3 - 5 · x = 5(3 - x)
Temperature after 20 minutes is found by multiplying-2.5 by 20 since it goes down by 2.5 degrees for one minute. -2.5 * 20 = -50. Adding this to 180.3 will give the temperature 130.3 degrees.
Answer:
it's -11
Step-by-step explanation:
hope this helped