Respuesta :
a + b = 300....b = 300 - a
10a + 6b = 2000
10a + 6(300 - a) = 2000
10a + 1800 - 6a = 2000
10a - 6a = 2000 - 1800
4a = 200
a = 200/4
a = 50 <=== 50 cases of apples
b = 300 - a
b = 300 - 50
b = 250....250 cases of bananas
10a + 6b = 2000
10a + 6(300 - a) = 2000
10a + 1800 - 6a = 2000
10a - 6a = 2000 - 1800
4a = 200
a = 200/4
a = 50 <=== 50 cases of apples
b = 300 - a
b = 300 - 50
b = 250....250 cases of bananas