-4
Because 15x-7x= 8x
8x+5x= 13x
13x= -52
-52 / 13= -4
x = -4
12 is first one 7 is 2nd one 9 is the last one
Answer: 75%
Step-by-step explanation:
15/20 = 3/4 or 75%
A differential equation is one that contains the derivative of a function. For example f(x) + 3 = 4f'(x) - 2. Usually you will be given one of the functions and initial conditions if you have to solve.
