Answer:8
Step-by-step explanation:
2x+5=21
2x+5-5=21=5
2x=16
2x/2=16/2
x=8
Answer:
x = 8
Step-by-step explanation:
In order to solve for x, we have to isolate the x variable
2x + 5 = 21
First, subtract 5 from both sides of the equation to isolate the 2x
2x = 16
Divide both sides by 2 to isolate the x
x = 8
We can check to makes sure that this answer is correct by plugging it back into the equation and solving.
2(8) + 5 = 21
16 + 5 = 21
21 = 21
