Question

A) -3 · x = -21 b) -7x + 16 = 2x - 20

Answer 1

Answer:7

Step-by-step explanation:

A) x= -21/-3

= 7 answer

Answer 2

Answer:

Step-by-step explanation:

a) -3x = -21

Divide both sides by (-3)

-3x/-3 = -21/-3

x = 7

b)  -7x + 16 = 2x - 20

Subtract 16 from both sides

-7x + 16 -16 = 2x - 20 -16

-7x = 2x - 36

Subtract 2x from both sides

-7x -2x = 2x - 36 - 2x

-9x = -36

Divide both sides by (-9)

-9x/-9 = -36/-9

x = 4