2(-2c-4)=-4c — step-by-step solution

Let's solve in

ℝ

2 \cdot (- 2 c - 4) = -4 c

2 \cdot (- 2 c - 4) + 4 c = 0

ⓘ Expand by multiplying each term inside the parentheses:

2 \cdot (- 2 c - 4)

- 4 c - 8

- 4 c - 8 + 4 c = 0

ⓘ Like terms are grouped by adding their coefficients:

- 4 c + 4 c

0

0 - 8 = 0

ⓘ Adding 0 changes nothing:

0 - 8

-8

-8 = 0

The statement

-8 = 0

is false, whatever the value of

c

▶Solution:

c \in \emptyset