Math
posted by Downer .
Bob's age is 4 times greater than Susan's age. Dakota is 3 years younger than Susan. The sum of Bob's Susan's and Dakota's ages is 93 what is Susan's age

Math 
scott
B + S + D = 93
B = 4S
D = S  3
substituting ... (4 S) + S + (S  3) = 93
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