Mr. Barker has 18 boys and 27 girls in choir. He wants each
student standing in a row that
is either all boys or all girls.
What is the greatest number of
students that can stand in each
row? How many rows of boys
are there? How many rows of
girls are there?

The greatest number of students that can stand in one row is 9. There are 2 rows of boys, and 3 rows of girls.

Step-by-step explanation:

1) the property is   ixi = a ⇔x = a   o x = -a

4(x-5)+3= 15⇒4x-20+3 = 15⇒4x-17= 15⇒4x = 15+17⇒4x = 32⇒x =32/4= 8

4(x-5) +3= -15⇒4x-20 +3 = -15⇒4x-17= -15⇒4x =-15+17⇒4x = 2⇒x =2/4= 1/2

the values are x =8 and x = 0,5