Mathematics
Naffy
2021-09-15 04:07:42
"Each boy in a family has as many brothers as sisters, but each girl has twice as many brothers as sisters. How many children are in the family?"
ANSWERS
lysharin
2021-09-15 09:44:51

so b=boys g=girls g=1/2b you woluld subtract 1 because not including the btother counting b-1 brother=g b-1=g g-1=1/2b subsitute b-1-1=1/2b add like terms b-2=1/2b mutiply both sides by 2 2b-4=b add 4 to both sides 2b=b+4 subtract b b=4 2 boys b-1=g 4-1=g=3 4 boys, 3 girl makes sense so if they are: bob, joe, sam, and bill,  then girls are sally, jill, and may then bob has 3 brothers: joe sam and bill this equals number of sisters may has sisters 1/2 of brothers, 2 sisters and 4 brothers 2 is 1/2 of 4 answer is 3 girls 4 boys

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