SOLUTION: Maria, Amy, and Sadie share food expenses. Amy pays $10 a month less than Maria. Sadie pays twice as much as Amy. If the monthly bill is $310, how much does each person pay?

Question 1099603: Maria, Amy, and Sadie share food expenses. Amy pays $10 a month less than Maria. Sadie pays twice as much as Amy. If the monthly bill is $310, how much does each person pay?

Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
.

Maria + Amy    + Sadie    = 310   dollars,

M     + (M-10) + 2*(M-10) = 310  ====>


M + M - 10 + 2M - 20 = 310  ====>  4M = 340  ====>  M =  = 85.


Answer.  Maria pays $85,  Amy $75,  Sadie $150.

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