2x+y=1 X-5y=5 Dengan menggunakan subtitusi Mohon secepatnya

2x + y = 1
x - 5y = 5
----------- -
x + 6y = -4
x = -4 -6y

2x + y = 1
2(-4 -6y) + y = 1
-8 -12y + y = 1
-11y = 9
y = 9/-11

eliminasi
2× + y = 1 |×1| 2× + y = 1
× - 5y = 5 |×2| 2× - 10y= 10 _
-------------------
11y = -9
y = -9/11

substitusi
2× + (-9/11) = 1
2× = 1- (-9/11)
2× = 1 9/11
×= 20/11 × 1/2 = 20/22 = 1 2/20 = 1 1/10


maaf kalau salah