Answers

2014-11-15T20:12:06+05:30
Quantity equation =A+B=10 pounds
value equation=75A+80B=78*10 cents
Multiply through the quantity equation by 80
80A+80B=80*10
75A+80B=78*10
Subtract and solve for A
5A=2*10=20
5A=20
A=4 pounds(amount of A needed in the mix)

0
2014-11-16T11:03:30+05:30
Quantity equation =A+B=10 pounds
value equation=75A+80B=78*10 cents
Multiply through the quantity equation by 80
80A+80B=80*10
75A+80B=78*10
Subtract and solve for A
5A=2*10=20
5A=20
A=4 pounds(amount of A needed in the mix)
0