Question

K + A = 20 kg
K + R = 10 kg
K + A + R = 24
tentukan nilai A ???

Answer 1

K + A = 20
K + R = 10
---------------- --
A - R = 10
K + A + R = 24
---------------------- --
K - 2R = -14
K + R = 10
------------------ --
3R = -24
R = -8
K + R = 10
K - 8 = 10
K = 18

K + A = 20
18 + A = 20
A = 2