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2x + y = 3
= 2x + 6y = 3
2x + y = 6
x-3y=5 |2|
sehingga
2x+y=3
2x-6y=10
-------------- -
7y=-7
y=-1 maka x-3(-1)=5
x+3=5
x=2
no 2.
2(p+l)=30
p+l=15
p=15-L
pXL=50
(15-L) X L =50
15L- = 50 maka - 15L +50
lalu difaktorkan (L-10)(L-5)
ada 2 kemungkinan jika L = 10 maka P=5 dan juga sebaliknya
no 3
ikan = I
ayam = A
3I + 1 A=37000 |2|
I+2A = 29000 |1|
-------------------------
6I +2A= 74000
I+2A=29000
------------------ -
5I= 45000
I=9000
I+2A=29000
9000+2A=29000
2A=20000
A=10000
no 4
x+y=29
x=y+1
x.y ?????
y+1+y=29
2y=28
y=14
=> x=y+1
x=14+1
x=15
x.y = 15 X 14
===============>>>> 210 .... salam sekian
jika benar tolong jadikan yg terbaik terima kasih sudah saling menolong .:D sesama harus dibantu :) (y)