Solve 2x − 12 = 26

The solution of 2x − 12 = 26 is x = 19.

2x - 12 = 26\ \Rightarrow\ x = 19

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The lines y = 2x − 12 and y = 26 meet at x = 19. 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.
$2x - 12 = 26$
2
Add 12 to both sides:
$2x - 12 + 12 = 26 + 12 \ \Rightarrow\ 2x = 38$
3
Divide both sides by 2:
$\frac{2x}{2} = \frac{38}{2} \ \Rightarrow\ x = 19$
4
Check: put x = 19 back into the equation.
$2\cdot19 - 12 = 38 - 12 = 26 \checkmark$

LaTeX source of the formulas on this page

\[ 2x - 12 = 26\ \Rightarrow\ x = 19 \]
\[ 2x - 12 = 26 \]
\[ 2x - 12 + 12 = 26 + 12 \ \Rightarrow\ 2x = 38 \]
\[ \frac{2x}{2} = \frac{38}{2} \ \Rightarrow\ x = 19 \]
\[ 2\cdot19 - 12 = 38 - 12 = 26 \checkmark \]

Trying values of x in 2x − 12 = 26

x	2x − 12	Equals 26?
17	22	no
18	24	no
19	26	yes
20	28	no
21	30	no

Questions

What is x in 2x − 12 = 26?

The solution of 2x − 12 = 26 is x = 19.

How do you solve 2x − 12 = 26?

Add 12 to both sides to get 2x = 38, then divide both sides by 2 to get x = 19.

How do I check the answer?

Replace x by 19: 2(19) − 12 = 26, which is 26.

Solve 2x − 12 = 26

How to work it out

Trying values of x in 2x − 12 = 26

Questions

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