Solve 6x − 12 = 54

The solution of 6x − 12 = 54 is x = 11.

6x - 12 = 54\ \Rightarrow\ x = 11

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The lines y = 6x − 12 and y = 54 meet at x = 11. 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.
$6x - 12 = 54$
2
Add 12 to both sides:
$6x - 12 + 12 = 54 + 12 \ \Rightarrow\ 6x = 66$
3
Divide both sides by 6:
$\frac{6x}{6} = \frac{66}{6} \ \Rightarrow\ x = 11$
4
Check: put x = 11 back into the equation.
$6\cdot11 - 12 = 66 - 12 = 54 \checkmark$

LaTeX source of the formulas on this page

\[ 6x - 12 = 54\ \Rightarrow\ x = 11 \]
\[ 6x - 12 = 54 \]
\[ 6x - 12 + 12 = 54 + 12 \ \Rightarrow\ 6x = 66 \]
\[ \frac{6x}{6} = \frac{66}{6} \ \Rightarrow\ x = 11 \]
\[ 6\cdot11 - 12 = 66 - 12 = 54 \checkmark \]

Trying values of x in 6x − 12 = 54

x	6x − 12	Equals 54?
9	42	no
10	48	no
11	54	yes
12	60	no
13	66	no

Questions

What is x in 6x − 12 = 54?

The solution of 6x − 12 = 54 is x = 11.

How do you solve 6x − 12 = 54?

Add 12 to both sides to get 6x = 66, then divide both sides by 6 to get x = 11.

How do I check the answer?

Replace x by 11: 6(11) − 12 = 54, which is 54.

Solve 6x − 12 = 54

How to work it out

Trying values of x in 6x − 12 = 54

Questions

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