IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: Haaks18 on October 22, 2010, 11:09:49 pm

Title: Maths Question..Over here :)!
Post by: Haaks18 on October 22, 2010, 11:09:49 pm

The sum of three numbers is 66. The second number is twice the first and six less than the third. Find the numbers

Title: Re: Maths Question..Over here :)!
Post by: Dibss on October 22, 2010, 11:34:41 pm

first no = x
second no = 2x
third number = 2x +6

their sum is 66 so:
x + 2x + 2x + 6 = 66
5x = 60
x = 12

first no = 12
second no = 2 x 12 = 24
third no = 24 + 6 = 30

(:

Title: Re: Maths Question..Over here :)!
Post by: Arthur Bon Zavi on October 23, 2010, 02:21:07 pm

Quote from: Dibss on October 22, 2010, 11:34:41 pm

first no = x
second no = 2x
third number = 2x +6

their sum is 66 so:
x + 2x + 2x + 6 = 66
5x = 60
x = 12

first no = 12
second no = 2 x 12 = 24
third no = 24 + 6 = 30

(:

Yeah!! 8)