Sunday

September 21, 2014

September 21, 2014

Posted by **joi** on Wednesday, December 28, 2011 at 9:19am.

- maths -
**bobpursley**, Wednesday, December 28, 2011 at 9:42amS=.3D

D=.4B

B+D+S=608

- maths -
**joi**, Wednesday, December 28, 2011 at 9:46amsorry i can't get it, pls explain further. tks

- maths -
**bobpursley**, Wednesday, December 28, 2011 at 11:58amfirst equation, combine that with the second and third equation.

S=.3D

S=.3*.4D

Put that into the last equation.

1) B+D+.12D=608

now, solve for B in the second equation

B=D/.4=2.5D Now put that in your equation 1) above, solve for D

**Answer this Question**

**Related Questions**

Maths Pri 5 - The number of S's stamps is 30% of D's stamps. The number of D's ...

Algebra - a colection of stamps consist of 2 cent stamps, 8 cent stamps, and 14 ...

algebra - An executive bought 300 stamps for $73.80. The purchase included 15 ...

math - Sam had a total of 80 foreign stamps and local stamps combined. After ...

math - A stamp collection consists of 3, 8, and 15 cent stamps. The number of 8 ...

Math - Julia has 1/3 has many stamps as Robert and also 2/3 as many stamps as ...

math - in an album, the ratio of the number of local stamps to the number of ...

4th grade math - brendan has 75 stamps in his collection. he puts 8 stamps on ...

Emily - 1.)Dylan has $2.30 and dimes and nickels The number of dimes exceeds the...

math - suppose you bought some 32 cent stamps and some 20 cent stamps. you spent...