Answer: there are 24 girls.
Step-by-step explanation:
Let x represent the number of boys in fifth grade at lenape elemantary school.
In fifth grade at lenape elemantary school,there are 4/7 as many girls as there are boys. This means that the number of girls in the school would be
4/7 × x = 4x/7
There are 66 students in fifth grade. This means that
x + 4x/7 = 66
Cross multiplying by 7, it becomes
7x + 4x = 462
11x = 462
x = 462/11
x = 42
The number of girls would be
66 - 42 = 24
4x - 9 = 6- x
4x + x = 6 + 9
5x = 15
x = 15/5
x = 3
Answer:
x= -5
3x+3=2x-2
3x-2x=-3-2
x=-5
37, 49
Divide 74 by two to get the first x. 74 / 2 = 37
Subtract 77 from 126 to get the second x. 126 - 77 = 49