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2kg mangga + 6kg jeruk = Rp.104.000
maka harga 1kg mangga = Rp 7.000
harga 1kg jeruk = Rp. 15.000
jadi harga 5kg mangga + 5kg jeruk = (5 x 7000) + (5 x 15000)
= 35rb + 75rb
= 110rb
mangga = x
jeruk = y
maka :
3x + 4y = 81000 x2 6x + 8y = 162000 (1)
2x + 6y = 104000 x3 6x +18y= 312000 (2)
pers 1 dan 2 di krang maka mendaptkan hsil
y = 15000
subtitusi y ke pers 1
3x + 4(15000) = 81000
3x = 81000- 60000
x = 21000/3 = 7000
masukan x dan y
5x +5y = ... ?
5(7000) + 5(15000) = 35000 + 75000
= 110000
jadi hrga 5 mngga dan 5 jruk adlh 110000