Penyelesaian :
X
= Lemari
Y = Kursi
PRODUK
|
PERAKITAN
|
PENGECATAN
|
KEUNTUNGAN
|
Lemari (X)
|
8
|
5
|
200
|
Kursi (Y)
|
7
|
12
|
100
|
Batasan
|
56
|
60
|
Fungsi Tujuan :
Z
= 200 X + 100 Y
a.
Fungsi kedua
(1)
8 X + 7 Y = 56
(2)
5 X + 12 Y = 60
b.
Menentukan Titik Potong Dari
Persamaan 1
Jika X = 0
8 X + 7 Y = 56 Titik
Potong (0,8) , (7,0)
8 (0) + 7 Y= 56
X =
= 8

Jika
Y = 0
8 X
+ 7 Y = 56
8 X
+ 7 (0)=56
X=
= 7

Titik Potong Dari Persamaan 2
Jika X = 0
5 X +12 Y = 60 Titik
Potong (0,5) , (12,0)
5 (0) + 12 Y=60
X =
= 5

Jika
Y = 0
5X
+ 12 Y = 60
5 X
+ 12 (0)=60
X=
= 12

c.
Menyelesaikan Persamaan
Eliminasi
X 5
|
X 8
|
8 X + 7 Y = 56 40 X + 35 Y = 280
5 X + 12 Y = 60 40 X + 96 Y = 480
0 + 61 =-200
Y =
Titik Potong (0 , 3,3) ,
(4,08 , 0)

Y = 3,3
5 X + 12 Y = 60
5 X + 12 (3,3) = 60
5 X + 39,6 = 60
5 X = 60 – 39,6
5 X = 20,4
X =

X = 4,08
d.
Penentuan solusi
·
(0,8)
Z = 200 X + 100 Y
= 200(0)+ 100(8)
= 0
+ 800
= 800
·
(7,0)
Z = 200 X + 100 Y
= 200(7)+ 100(0)
= 1400+ 0
= 1400
·
(0 , 3,3)
Z = 200 X + 100 Y
= 200(0)+ 100(3,3)
= 0+ 330
= 330
·
(7,0)
Z = 200 X + 100 Y
= 200(4,08)+ 100(0)
= 816 + 0
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