3x + y = 4 dan -x + 2y=1 dengan cara nya

[tex]3x + y = 4(kali \: \: \: 2) \\ - x + 2y = 1(kali \: \: \: 1) \\ \\ 6x + 2y = 8 \\ \frac{- x + 2y = 1}{7x = 7} \\ x = \frac{7}{7} = 1 \\ \\ - x + 2y = 1 \\ - 1 + 2y = 1 \\ 2y = 1 + 1 = 2 \\ y = \frac{2}{2} = 1[/tex]

3x + y = 4 (dikali 2)
-x +2y = 1 (dikali 1)
--------------------------- -
6x + 2y = 8
-x + 2y = 1
---------------- -
7x = 7
x = 1

-x + 2y = 1
-1 + 2y =1
2y = 2
y =1

itu garis putus" mksd nya garis lurus biasa yaa.. semoga membantu