Answer:


Step-by-step explanation:
Given


Required
Solve
Substitute
in 

Open bracket

Collect like terms


Divide both sides by 2

Substitute
in 



No that statement is not always true. There is only one solution to this equation.
The greatest possible number of club members is 7
<em><u>Solution:</u></em>
Given that, local readers’ club has a set of 49 hardback books and a set of 21 paperbacks
Each set can be divided equally among the club members
To find the greatest possible number of club members, we have to find the greatest common factor of 49 and 21
The greatest number that is a factor of two (or more) other numbers.
When we find all the factors of two or more numbers, and some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor.
<em><u>Greatest common factor of 49 and 21:</u></em>
The factors of 21 are: 1, 3, 7, 21
The factors of 49 are: 1, 7, 49
Then the greatest common factor is 7
Thus, the greatest possible number of club members is 7
The second one
Pls mark brainliest
Answer:
I'm going to say C
it looks the most reasonable to me