Mackenzie spent $20 at the local farmer’s market. she bought b pounds of blueberries that cost $4 per pound, and r pounds of raspberries that cost $6 per pound. she wrote the equation 4b+6r=20 to represent the cost of all the fruit. which is equivalent to mackenzie’s equation?

A)

Step-by-step explanation:  To solve this problem we need to express the given equation in different ways (for example, isolating b or r) and compare it with the given options, to see which one of them is correct:

given equation:

4b+6r=20

isolating r:

6r=20-4b

simplifying by 2:

isolating b:

4b=20-6r

simplifying by2:

dividing each term by 2: