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PSYCHO15rus [73]
3 years ago
9

Rita's mother is 4 times as old as she is. Her grandmother is twice as old as her mother. If the sum of their age is 194, how ol

d are Rita, her mother, and her grandmother?
Mathematics
1 answer:
romanna [79]3 years ago
7 0
R=rita's age
m=mother's age
g=grandmother's age



mother is 4 times as old as rita
m=4r

grandmother is 2 times as old as mother
g=2m

sum is 104

r+m+g=104
subsitute 4r for m and 2m for g
r+4r+2m=104
subsitute 4r for m
r+4r+2(4r)=104
r+4r+8r=104
13r=104
divide both sides by 13
r=8
4r=m=32
8r=2m=g=64


rita is 8
mother is 32
grandmother is 64
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