Question

tentukan grafik penyelesaian dari sistem persamaan berikut :
a. 2x – 4y = 6 dan 4x – 2y = -12
b. 3x + 2y = -12 dan 3x -6y = 12​

Answer 1

Answer:

2x - 4y = 6

4x - 2y = -12

= 8x - 16y = 24

8x - 4y = -24

- + = +

-12y = 48

-y = 48/12

y = -4

2x-4y=6

2x-4×(-4) =6

2x + 16 = 6

2x = 6-16

2x = -10

x = -10/2

x= -5

SO,

x = -5

and

y = -4