Saturday

December 20, 2014

December 20, 2014

Posted by **Carly** on Saturday, February 25, 2012 at 8:46pm.

1 1/2b+4w=18

b+w=7

Please help me and show your work thanks

- Math -
**Reiny**, Saturday, February 25, 2012 at 8:54pm1 1/2b+4w=18

(3/2)b + 4w = 18

times 2

3b + 8w = 36

equation #2 times 3

3b + 3w = 21

subtract them

5w = 15

w = 3

back into b+w=7

b+3=7

b=4

**w=3, b=4**

check::

1.5(4) + 4(3) = 18 , yeah

4+3=7, yeah

- Math -
**Damon**, Saturday, February 25, 2012 at 8:57pm1.5 b + 4 w = 18

b + w = 7 so w = (7-b)

1.5 b + 4 (7-b) = 18

1.5 b + 28 - 4 b = 18

10 = 2.5 b

b = 4

then

w = 3

**Answer this Question**

**Related Questions**

math - of the following which is the closest approximation to the amount of time...

time n work - a and b together can do a piece of work in16 days.b and c can do ...

math - A and B together can make a wall in 60 days. A has worked for 12 days, B ...

MATH - FOUR CYCLISTS A,B,C&D WANTS TO CROSS A BRIDGE BUT DUE TO BAD CONDITION OF...

Math - Bilawal can build a wall in 15 days and Bilal in 20 days. If the work on ...

Math - Bilawal can build a wall in 15 days and Bilal in 20 days. If the work on ...

Math - Bilawal can build a wall in 15 days and Bilal in 20 days. If the work on ...

chemistry - The disintegration of a radioisotope, such as I-131 to Xe-131, is ...

Math - Ansgar is writing a novel. He writes seven days a week. On each of those ...

algebra (inequalities) - a weaver spends $420 on supplies to make wall hangings ...