Latihan

By Admin ReiPosted on October 28, 2022

1. Gunakan cara gabungan
1.) x+y = 5
2x – y= 4

2.) 3x + 2y = 12
x + 2y = 8

Latihan

Latihan

Jawaban

1. $x = 4frac{1}{2}$

$y = frac{1}{2}$

2. x = 2

y = 3

Langkah-langkah

1.

x + y = 5

x – y = 4

Eliminasi x, substitusi y

x + y = 5

x – y = 4 –

2y = 1

$y = frac{1}{2}$

$x - frac{1}{2} = 4$

$x = 4 frac{1}{2}$

2.

3x + 2y = 12

x + 2y = 8

Eliminasi y, substitusi x

3x + 2y = 12

x + 2y = 8 –

2x = 4

x = 2

x + 2y = 8

2 + 2y = 8

2y = 6

y = 3