SOLUTION: The cost of six shirts and 2 pairs of trousers is 1320. While that of 3 shirts and 4 pairs of trousers is 1290. Find using a matrix method the cost of 2 shirts and 2 pairs of trou

Question 359550: The cost of six shirts and 2 pairs of trousers is 1320. While that of 3 shirts and 4 pairs of trousers is 1290. Find using a matrix method the cost of 2 shirts and 2 pairs of trousers.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Let be the cost of the shirt, the trousers.

.
.
.
[A]=
[x]=
[b]=
[A][x]=[b]
[x]=[A]inv[b]
.
.
.
det[A]=
.
.
.
[A]inv=
.
.
[x]=
.
.
.
So then 2 shirts and 2 trousers would be

RELATED QUESTIONS
Hello, if a man has 100 shirts, 100 pairs of trousers, 100 jackets and 100 pairs of... (answered by Fombitz)

1)Alan has 5 pairs of trousers and 6 shirts. Ben has 7 pairs of trousers and 4 shirts.... (answered by Edwin McCravy)

Zac has three jackets, one black, on brown and one blue. He has four shirts, one white,... (answered by Edwin McCravy)

i need help!!! Im stuck on this word problem. Three Pairs of jeans and six shirts... (answered by Alan3354)

three pairs of jeans and six shirts cost $195. the cost of four pairs of jeans and five... (answered by sofiyac)

A factory produced x dresses and y pairs of trousers daily for 6 days and twice as many... (answered by josmiceli)

Rob bought 2 pairs of shorts, 3 shirts and a pair of shoes for $146.64. Jessie bought 3... (answered by mananth)

Three shirts,two pairs of pants,and a hat cost $97.One shirt, four pairs of pants, and... (answered by josmiceli)

Sam bought 3 shirts and 2 pairs of pants for $85.50. Randy bought 4 shirts and 3 pairs of (answered by mananth,MathTherapy,greenestamps)