Penjelasan dengan langkah-langkah:
Bagian A)
[tex] = 4 \times z[/tex]
[tex] = 4z[/tex]
Bagian B)
[tex] = (a + b) \times 7[/tex]
[tex] = (7 \times a) + (7 \times b)[/tex]
[tex] = 7a + 7b[/tex]
Bagian C)
[tex] = 4 - c \times 2[/tex]
[tex] = 4 - (c \times 2)[/tex]
[tex] = 4 - 2c[/tex]
[tex] = - 2c + 4[/tex]
Bagian D)
[tex] = 1 \div z[/tex]
[tex] = \frac{1}{z} [/tex]
[tex] = {z}^{ - 1} [/tex]