Question

John has 30 friends. Then amount of male friends is 4 more than the number of female friends. Which system can be used to find the number of male and female friends?

Answer 1

Answer:

The required system of equations is:

$m+f = 30\\m = f+4$

Step-by-step explanation:

First of all, the variables have to be selected to represent the quantities.

Let m be the number of male friends and let f be the number of female friends.

Then according to first statement "John has 30 friends"

$m+f = 30\ \ \ \ Eqn\ 1$

And according to second statement "amount of male friends is 4 more than the number of female friends."

$m = f+4\ \ \ \ Eqn\ 2$

Hence the required system of equations is:

$m+f = 30\\m = f+4$