Answer:
Step-by-step explanation:
A variable is a number that is not known yet. It is usually represented by a letter.
A. 13 - x = 9......the variable here is x
B. ? + 7 = 12.....not 100% sure on this one, but the question mark is in place of an unknown number...so I guess this can be used for a variable.
C and D do not contain any variables
This the answer don’t worry about the
Answer
Answer:
-10 + 6
Step-by-step explanation:
I multiplied both sides by two, if you want to answer it fully, its -10 + 6 which is -4
Answer: r=4b/m-k
Step-by-step explanation: I think