Answer:
x = -2
Step-by-step explanation:
2x + 1 + 3 = 0
2x + 4 = 0
x = -2
Answer:
a. addition property of equality
Step-by-step explanation:
2x was added to both sides
Answer:

Step-by-step explanation:
Recall the form of the difference of squares.

Now let's apply it to your numbers:

Simplify:

Answer:
b= 17
Step-by-step explanation:
b - 6 = 11
Add 6 to each side
b-6+6 = 11+6
b = 17