latihan! ③ Tentukan penyelesaian sistim persamaan berikut a.xty=10 dan x-y=4 b. x-y = 3 dan 2x + 3y =16 C.3x+y=7 dan 5x-3y = 7
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Jawaban:
jawaban ada di foto ya.
semoga membantu
Jawab:
a. x=7; y=3
b. x=5; y=2
c. x=2; y=1
Penjelasan dengan langkah-langkah:
a.
x+y=10
x-y=4 +
2x = 14
x = 7
x-y= 4
7-y=4
7-4 = y
y=3
b.
x-y = 3 | x2 | 2x - 2y = 6
2x+3y = 16 | x 1 | 2x + 3y = 16 -
- 5y = -10
y = 2
x - y = 3
x - 2 = 3
x = 5
c.
3x + y = 7 | x3 | 9x + 3y = 21
5x - 3y = 7 | x 1 | 5x - 3y = 7 +
14x = 28
x = 2
3x + y = 7
3 (2) + y = 7
6 + y = 7
y = 1
