Question

Jika 12x-6y= 60 dan 16x = 8-4y,
maka x + y =

urgent tolong benget yahhh​

Answer 1

Jawaban:

-4

Penjelasan dengan langkah-langkah:

12x - 6y = 60 ... pers 1

16x = 8 - 4y

16x + 4y = 8 ... pers 2

gunakan metodel eliminasi

12 x - 6y = 60 | x4 | 48x - 24y = 240

16x + 4y = 8. | x6 | 96x + 24y = 48

———————— +

144x = 288

maka nilai x = 2

mencari nilai y

• 16x + 4y = 8

gunakan metode substitusi

16(2) + 4y = 8

32 + 4y = 8

4y = -24

y = -6

maka x + y

x + y =

2 + (-6) =

2 - 6 = -4

Answer 2

12x - 6y = 60

2x - y = 10

-y = -2x + 10

y = 2x - 10

16x = 8 - 4y

4x = 2 - y

4x = 2 - (2x - 10)

4x = 2 - 2x + 10

4x + 2x = 2 + 10

6x = 12

x = 2

y = 2x - 10

y = 2(2) - 10

y = 4 - 10

y = -6

x + y = 2 + (-6) = -4