Solve 2x − 12 = −16

The solution of 2x − 12 = −16 is x = -2.

2x - 12 = -16\ \Rightarrow\ x = -2

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The lines y = 2x − 12 and y = -16 meet at x = -2. 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.
$2x - 12 = -16$
2
Add 12 to both sides:
$2x - 12 + 12 = -16 + 12 \ \Rightarrow\ 2x = -4$
3
Divide both sides by 2:
$\frac{2x}{2} = \frac{-4}{2} \ \Rightarrow\ x = -2$
4
Check: put x = -2 back into the equation.
$2\cdot(-2) - 12 = -4 - 12 = -16 \checkmark$

LaTeX source of the formulas on this page

\[ 2x - 12 = -16\ \Rightarrow\ x = -2 \]
\[ 2x - 12 = -16 \]
\[ 2x - 12 + 12 = -16 + 12 \ \Rightarrow\ 2x = -4 \]
\[ \frac{2x}{2} = \frac{-4}{2} \ \Rightarrow\ x = -2 \]
\[ 2\cdot(-2) - 12 = -4 - 12 = -16 \checkmark \]

Trying values of x in 2x − 12 = −16

x	2x − 12	Equals -16?
-4	-20	no
-3	-18	no
-2	-16	yes
-1	-14	no
0	-12	no

Questions

What is x in 2x − 12 = −16?

The solution of 2x − 12 = −16 is x = -2.

How do you solve 2x − 12 = −16?

Add 12 to both sides to get 2x = -4, then divide both sides by 2 to get x = -2.

How do I check the answer?

Replace x by -2: 2(-2) − 12 = -16, which is -16.

Solve 2x − 12 = −16

How to work it out

Trying values of x in 2x − 12 = −16

Questions

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