Ratios How do I solve this? In an election for senior class president, Alice received 30 votes more than David. If the ratio of the number of votes Alice received to the number of votes David received was 8 to 7, how many votes did David receive? I have two unknowns: # of votes David receives = 7/15 times some number to give 30 + some number. 
Re: Ratios If the ratio is 8:7 doesn't it just mean that David received 7*30 votes, which is 210? Or am I missing something silly Or using simultaneous equations: a  30 = d 7/8a = d 8a  240 = 8d 7a = 8d a  240 = 0 a = 240 d = 210 
Re: Ratios Hello, Chimoo! Quote:
Absolutely correct! A terrific "eyeball" solution! 
Re: Ratios Quote:

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