Answer:
x = 10
Step-by-step explanation:

Step 1 : Collect like terms and simplify

Step 2 : Divide both sides of the equation by 2

Step 3 : Simplify by cross cancellation of common term : 2

I HOPE IT WILL HELP YOU. I DID HOW I KNOW .
Answer:
Evaluate. To find the value of a numerical or algebraic expression. Variable. a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity.
Step-by-step explanation:
Hope this help!!
The first one:
a. $12.00
b. $23.75
c. They would receive $1.25
The second one:
a. $10.00
b. $13.27
c. $3.27
The third one:
I don't know I'm sorry, hope the other ones help though!
No, the graphs of the lines are not parallel because if you simplify 27x-3y=-81, you get y=9x+27, and in order to have the lines parallel, both equations must have the same "m" in y=mx+b. 6 and 9 do not equal, so no they are not parallel.