Answer: 
Step-by-step explanation:
To solve this exercise you need to remember the following:
→ 
Therefore, keeping the above on mind, you can solve for x as following:


Remember that, by definition:
, then you have:

Subtract 6 from both sides of the equation.
Then the value of x is:

Answer:
x=0,-2
Step-by-step explanation:
Solve the solution by equaling them to each other and solve for x.
x^2+5x+6=3x+6
x^2+5x-3x+6-6=0
x^2+2x=0 (factor out one x)
x(x+2)=0
x has two solutions since there are two options of solving.
1. x=0/(x+2)
x=0
2. x+2=0/x
x+2=0
x=-2
This system has one solution, because both of the equations are linear. The answer is (4/3, -2).
Answer:
2
Step-by-step explanation:
the rate of change is Rise/ Run
= Δy / Δx
= (y2 – y1) / (x2 – x1)
= (1 - (-1))/(-1 - (-2))
=2/1
=2
Answer:
18
Step-by-step explanation:
When x equals -3, then the first equation is simplified to 9 + 6 + 3 = 18; and the second equation confirms the same answer by showing -6 x -3 = 18