When planning his crops, farmer joe knows that his 5 acres can support corn and strawberries. he wants to make $5,500 from his crops. he can make $1,000 per acre of corn (the variable c) and $1,500 per acre of strawberries (the variable s). which equation below would be a constraint in his system of equations?

c + s = 5
c − s = 5
1,500c + 1,000s = 5,500
1,500s − 1,000c = 5,500