Problema Solution
one loaf of bread and six rolls cost $1.80. At the same prices, two loaves of bread and four rolls cost $2.40. How much does one loaf a bread cost?
Answer provided by our tutors
Let
x = the cost of one loaf of bread
y = the cost of one roll
One loaf of bread and six rolls cost $1.80:
x + 6y = 1.80
Two loaves of bread and four rolls cost $2.40:
2x + 4y = 2.40
We have the system of equations:
x + 6y = 1.80
2x + 4y = 2.40
........
........
x = $0.90
y = $1.15
One loaf of bread costs $0.90 or 90 cents.