Question

FAN AND MEDALLLLLL
When planning his crops, Farmer Tim knows that his 7 acres can support peas and carrots. He wants to make $7,000 from his crops. He can make $2,000 per acre of peas (the variable p) and $1,000 per acre of carrots (the variable c). Which equation below would be a constraint in his system of equations?

2,000p + 1,000c = 7,000

2,000p - 1,000c = 7,000

p + c = 7

c - p = 7

Answer 1

I think its "a" but not sure

Answer 2

yep c: