SOLUTION: A school has 1025 students. A totl of 400 students can not swim. This consists of 1/5 of the boys and 4/7 f the girls. If x boys can swim, write an equation for x and solve it. How

Question 1015783: A school has 1025 students. A totl of 400 students can not swim. This consists of 1/5 of the boys and 4/7 f the girls. If x boys can swim, write an equation for x and solve it. How many boys are the ere in the school?
Found 2 solutions by ikleyn, ankor@dixie-net.com:
Answer by ikleyn(52832) (Show Source): You can put this solution on YOUR website!

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A school has 1025 students. A total of 400 students can not swim.
This consists of 1/5 of the boys and 4/7 of the girls.
If x boys can swim, write an equation for x and solve it.
How many boys are the there in the school?
:
I will be easier if we find out how many boys & girls are in the school
let b = no. of boys in the school
let g = no. of girls
:
b + g = 1025
the number of girls & boys who can't swim are given as 400
b + g = 400
Get rid of the denominators, multiply by 35
7b + 20g = 14000
multiply the 1st equation by 7, subtract from the above equation
7b + 20g = 14000
7b + 7g = 7125
------------------subtraction eliminates b, find g
0 + 13g = 6825
g = 6825/13
g = 525 girls in the school
then
1025 - 525 = 500 boys in the school
"If x boys can swim, write an equation for x and solve it."
x = 500(- )
x = 500()
x = 400 boys can swim
RELATED QUESTIONS
can you help me sirs... 2/5 of the students in a school were girls and the rest were... (answered by ptaylor)
in a class of 10 students, there are 4 boys and 6 girls. If a committee of 5 students is... (answered by stanbon)
In a school of 600 students,the number of boys is 40 more than the number of girls.3/4 of (answered by ewatrrr)
A class consists of 8 students (4 boys 4 girls) and one teacher. In how many ways can the (answered by ewatrrr)
There are 900 students in a school, the ratio of girls to boys is 5:4 how many boys and... (answered by Alan3354)
Moore middle school has 850 students. A ratio of boys to girls of 7 to 5 can be used to... (answered by jorel555)
A school has 630 students. The ratio of the number of boys to the number of girls is 3:2. (answered by josgarithmetic,MathTherapy)
A group consists of 6 students (3 boys and 3 girls) and one teacher. In how many ways... (answered by Edwin McCravy)
a school has 1800 boys which is 5/9 of total students find the ratio of girls to boys... (answered by thesvw)