evhicestasi
Jawab : a. anggap andri = a Hadi = b maka persamaanya, 1/2a + b = 60 , 2/3a - 1/3b = 20 b. 1/2a + b = 60 }x1 => 1/2a + b = 60 2/3a - 1/3b = 20 }x3 => 2a - b = 60 ----------------- + 1/2a = 120 a = 240 maka uang andri = 1/2 x 240 = 120ribu 1/2a + b = 60 1/2a.40 + b = 60 b = 40 ribu uang Hadi
evhicestasi
1/2a + b = 60
2a - b = 60
------------------ +
5/2a = 120
a = 240/5
a = 48
maka uang andri = 1/2 x 48 = 24
1/2a + b = 60
1/2a x 24 + b = 60
b = 60 - 12
= 48
Hadi = b
maka persamaanya, 1/2a + b = 60 , 2/3a - 1/3b = 20
b. 1/2a + b = 60 }x1 => 1/2a + b = 60
2/3a - 1/3b = 20 }x3 => 2a - b = 60
----------------- +
1/2a = 120
a = 240
maka uang andri = 1/2 x 240 = 120ribu
1/2a + b = 60
1/2a.40 + b = 60
b = 40 ribu uang Hadi