Solve 2x − 4 = −6

The solution of 2x − 4 = −6 is x = -1.

2x - 4 = -6\ \Rightarrow\ x = -1

Explain it step by step in chat Make a short video of it

The lines y = 2x − 4 and y = -6 meet at x = -1. The solution of the equation is the x-coordinate of the point where the two sides are equal.

How to work it out

1
The goal is to get x alone. Undo the operations in the opposite order: first the subtraction, then the multiplication.
$2x - 4 = -6$
2
Add 4 to both sides:
$2x - 4 + 4 = -6 + 4 \ \Rightarrow\ 2x = -2$
3
Divide both sides by 2:
$\frac{2x}{2} = \frac{-2}{2} \ \Rightarrow\ x = -1$
4
Check: put x = -1 back into the equation.
$2\cdot(-1) - 4 = -2 - 4 = -6 \checkmark$

LaTeX source of the formulas on this page

\[ 2x - 4 = -6\ \Rightarrow\ x = -1 \]
\[ 2x - 4 = -6 \]
\[ 2x - 4 + 4 = -6 + 4 \ \Rightarrow\ 2x = -2 \]
\[ \frac{2x}{2} = \frac{-2}{2} \ \Rightarrow\ x = -1 \]
\[ 2\cdot(-1) - 4 = -2 - 4 = -6 \checkmark \]

Trying values of x in 2x − 4 = −6

x	2x − 4	Equals -6?
-3	-10	no
-2	-8	no
-1	-6	yes
0	-4	no
1	-2	no

Questions

What is x in 2x − 4 = −6?

The solution of 2x − 4 = −6 is x = -1.

How do you solve 2x − 4 = −6?

Add 4 to both sides to get 2x = -2, then divide both sides by 2 to get x = -1.

How do I check the answer?

Replace x by -1: 2(-1) − 4 = -6, which is -6.

Solve 2x − 4 = −6

How to work it out

Trying values of x in 2x − 4 = −6

Questions

Similar equations