Solve 2x − 6 = −8

The solution of 2x − 6 = −8 is x = -1.

2x - 6 = -8\ \Rightarrow\ x = -1

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

The lines y = 2x − 6 and y = -8 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.
$2x - 6 = -8$
2
Add 6 to both sides:
$2x - 6 + 6 = -8 + 6 \ \Rightarrow\ 2x = -2$
3
Divide both sides by 2:
$\frac{2x}{2} = \frac{-2}{2} \ \Rightarrow\ x = -1$
4
Check: put x = -1 back into the equation.
$2\cdot(-1) - 6 = -2 - 6 = -8 \checkmark$

LaTeX source of the formulas on this page

\[ 2x - 6 = -8\ \Rightarrow\ x = -1 \]
\[ 2x - 6 = -8 \]
\[ 2x - 6 + 6 = -8 + 6 \ \Rightarrow\ 2x = -2 \]
\[ \frac{2x}{2} = \frac{-2}{2} \ \Rightarrow\ x = -1 \]
\[ 2\cdot(-1) - 6 = -2 - 6 = -8 \checkmark \]

Trying values of x in 2x − 6 = −8

x	2x − 6	Equals -8?
-3	-12	no
-2	-10	no
-1	-8	yes
0	-6	no
1	-4	no

Questions

What is x in 2x − 6 = −8?

The solution of 2x − 6 = −8 is x = -1.

How do you solve 2x − 6 = −8?

Add 6 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) − 6 = -8, which is -8.

Solve 2x − 6 = −8

How to work it out

Trying values of x in 2x − 6 = −8

Questions

Similar equations