Answer:
Number of CDs in Walter's collection = x = 36
Step-by-step explanation:
x denotes number of CDs in Walter's collection.
Also, the number of CDs in Brian's collection is 3 times the number in Walter's collection.
Number of CDs in Brian's collection
Total number of CDs in both Walter's collection and Brian's collection = 144
So,
Number of CDs in Walter's collection = x = 36
Answer:
1) Word Problem
Sally has $2 and her mother gave her $10 to buy something from the store. Sally spent $7 at the store. How much money does Sally have now?
Expression
(2 + 10) - 7
2) Word Problem
Bob has 5 friends and each of them gave Bob 2 cookies. Bob originally had 2 of his own cookies. After collecting all of the cookies Bob split them evenly among him and his friends. How many cookies does each person have?
Expression
(5 x 2 + 2) ÷ 6
Answer:
A system of equations is a set of equations which are collectively satisfied by one solution of the variables.
Answer:
35
Step-by-step explanation:
20% * x = 7
20/100 * x= 7
x = 7 *100/20 (7*100÷20)