Question

Ini soalnya 1 dan 4 aja kak

Answer 1

3x + 5 = -1
3x = -1 - 5
3x = -6
x = -2

2/3x - 1/2y = 2. (kali 6)
1/2x - 2/5y = 4. (kali 10)

4x - 3y = 12. (kali 5)
5x - 4y = 40 (kali 4)

20x - 15y = 60
20x - 16y = 160
------------------------ -
y = -100

2/3x - 1/2y = 2
2/3x - 1/2(- 100) = 2
2/3x + 50 = 2
2/3 x = -48
x = 48 x 3/2
x = -72

maka nilai
5x - 2y
5(-72) - 2(-100)
-160

^_^
cherry