Answer:
x = 1
Step-by-step explanation:



18x + 5 = 23
18x = 23 - 5
18x = 18
x = 1
Therefore, x = 1 is the solution of the given expression.
Answer:

There are 16 friends at Jack's party.
Step-by-step explanation:
Please consider the complete question.
Jack's mother gave him 50 chocolates to give to his friends at his birthday party. He gave 3 chocolates to each of his friends and still had 2 chocolates left. Write an equation to determine the number of friends (x) at Jack's party. Find the number of friends at Jack's party.
Since there are x friends at party, so chocolate given to x friends would be 3 times x
because Jack gave 3 chocolates to each friend.
As Jack has 2 chocolates left after giving to his friends, so total numbers of chocolates would be
.
Now we will equate total number of chocolates by 50 as:

Therefore, the equation
can be used to find number of Jack's friends.
Let us solve for x.




Therefore, there are 16 friends at Jack's party.
Answer:
Zero
Step-by-step explanation:
In math, an identity is a number, n, that when added to other numbers, gives the same number, n. The additive identity is always zero. This brings us to the identity property of addition, which simply states that when you add zero to any number, it equals the number itself
20% x 5 = 100%
Depreciation means decreased of a value
The square root of 144=12
169=13
the difference is 13-12=1