Tentukan himpunan penyelesaian dari SPLDV berikutnya dgn metode subtitusi a. 5x - 2y = -1 5x - y = 7 B.3x + 5y = 16 6x - 4y = 4

A. 5x-2y = -1
5x-y = 7 _
-y. = -8
y = 8

5x-y=7
5x-8=7
5x =15
x=3


B. 3x + 5y =16
6x - 4y = 4 +

9x+y = 20
y=20-9x


6x-4y=4
6x-4(20-9x)=4
6x-80+36x=4
42x=84
x=2

y=20-9x
y=20-18
y=2


semoga bermanfaar

a. 5x-2y=-1
5x-y=7

x=-1/5 + 2/5y
5x - y =7

5(-1/5 +2/5y)-y=7
-1+2y-y=7
-1+y=7
y=7+1
y=8

subsitusi Y ke pers 2
5x-y=7
5x-8=7
5x=7+8
5x=15
x=3


B. 3x+5y=16
6x-4y=4

x=16/3 - 5/3y
6x-4y=4
6(16/3 - 5/3y)-4y=4
32-10y-4y=4
32-14y=4
-14y=4-32
-14y=-28
y=2

subsitusi y ke pers 2.
6x-4y=4
6x-4(2)=4
6x-8=4
6x=4+8
6x=12
x=2