Can someone please help me solve this, its difficult for me to understand. I need to find out how much calcium and iron I need to make up for the recommended

one package brocolli = 159mg Calcium and 2.3mg Iron

1/2 cup corn = 3.3mg calcium and 0.3c iron

Recommended daily value of calcium and iron are 1000mg of calcium and 18mg of iron.

 

b = package of brocolli

c = 1/2 cup corn

 159b + 3.3c = calcium requirement

2.3b + 0.3c = iron requirement

159b + 3.3c = 1000 mg

2.3b + 0.3c = 18mg