4 x – 2y = 10 -3x + y = -9

4x+10=2y

3x-9 =y

change it into:

4x+10=2y

2(3x-9=y)

its become

4x+10=2y

6x-18 =2y

___________ _

-2x-8 =0

-2x =8

x=8/-2

x=-4

y–> substitusion

6(-4)-18=2y

-24-18 =2y

-42 =2y

y =-21

Penjelasan dengan langkah-langkah:

4x – 2y = 10 (x1)

3x + y = -9 (x2)

4x – 2y = 10

6x +2y = -18

____________ ( – )

-2x = 28

x = 28/2

x = 14

Substitusi x = 14 ke 3x + y =-9

3x + y = -9

3(14) + y = – 9

42 + y = -9

y = 42 + (-9)

y = -51