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 old are Rita, her mother, and her grandmother?
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
