Question

a special olympics event has 20 more boys than girls competing. the total number of participants is 1000. how many boys competed and how many girls competed?

Answer 1

b + g = 1000
b = g + 20

g + 20 + g = 1000
2g + 20 = 1000
2g = 1000 - 20
2g = 980
g = 980/2
g = 490 <=== there are 490 girls

b = g + 20
b = 490 + 20
b = 510 <=== there are 510 boys