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2b + 3s + 4p = 18.500
b + 2s + 3p = 12.500
2b + 2s + p = 9.500
2b + 3s + 4p = 18.500
2b + 2s + p = 9.500
-------------------------------- -
s + 3p = 9.000
2b + 4s + 6p = 25.000
2b + 3s + 4p = 18.500
------------------------------- -
s + 2p = 6.500
s + 3p = 9.000
s + 2p = 6.500
---------------------- -
p = 2.500
subsitusikan s + 2p = 6.500
s + 2(2.500) = 6.500
s + 5000 = 6500
s = 1.500
subsitusikan ke 2b + 3s + 4p = 18500
2b + 4500 + 10.000 = 18500
2b = 4000
b = 2.000
jawaban E
no 10)
a + b + c = 26
b - a = 3
b = 3 + a
c - 2a = 3
c = 3 + 2a
a + b + c = 26
a + (3+a) + (3+2a) = 26
4a = 26 - 6
4a = 20
a = 5
b = 3 + a
= 3 + 5
= 8
c = 3 + 2a
= 3 + 10
= 13
c - a = 13 - 5
= 8 tahun
jawaban C