Question

Tolong yah guys? nomer 6 dan 4 besok dikumpulkan.......

Answer 1

Nomor 4
Karena A = B

Maka :
8x + 8y = 6
8x + 16y = 30 _
         -8y = 24
            y = 24/-8
            y = -3

Masukkan y,
8x + 8y = 6
8x + 8(-3) = 6
8x - 24 = 6
8x = 6 + 24
8x = 30
x = 30/8
x = 3,75

16z = 32
z = 32/16
z = 2

Jadi, nilai x = 3,75 nilai y = -3 dan nilai z = 2

Nomor 6
a)
2x = 6
x = 6/2
x = 3

y - 1 = 5
y = 5 + 1
y = 6

b)
x + y = 2
x - y = 4 _
     2y = -2
       y = -2/2
       y = -1

Masukkan y,
x + y = 2
x + (-1) = 2
x - 1 = 2
x = 2 + 1
x = 3

c)
x² - x = 6
x² - x - 6 = 0
(x + 2) • (x - 3) = 0

x + 2 = 0
x = -2

atau

x - 3 = 0
x = 3

2y² = 18
y² = 18/2
y² = 9
y = √9
y = 3

Semoga membantu . . .