Jika membeli 3 apel ditambah 2 jeruk harganya Rp 7.800. Jika membeli 2 apel ditambah 3 jeruk harganya Rp 8.200. Brapa harga 1 apel ditambah 1 jeruk ?

3a + 2j = 7800 
2a +3j = 8200

6a + 4j = 15600
6a + 9j = 24600

4j - 9j = 15600 - 24600
-5j = -9000
j = -9000/-5
j = 1800

2a + 3j = 8200
2a + 3(1800) = 8200
2a + 5400 = 8200
2a = 8200 - 5400
2a = 2800
a = 2800 / 2
a = 1400

a + j = 1400 + 1800
a + j = 3200


sory kalo panjang tapi emang kaya gini