Solve 12x + 6 = −54

The solution of 12x + 6 = −54 is x = -5.

12x + 6 = -54\ \Rightarrow\ x = -5

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The lines y = 12x + 6 and y = -54 meet at x = -5. 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 addition, then the multiplication.
$12x + 6 = -54$
2
Subtract 6 from both sides:
$12x + 6 - 6 = -54 - 6 \ \Rightarrow\ 12x = -60$
3
Divide both sides by 12:
$\frac{12x}{12} = \frac{-60}{12} \ \Rightarrow\ x = -5$
4
Check: put x = -5 back into the equation.
$12\cdot(-5) + 6 = -60 + 6 = -54 \checkmark$

LaTeX source of the formulas on this page

\[ 12x + 6 = -54\ \Rightarrow\ x = -5 \]
\[ 12x + 6 = -54 \]
\[ 12x + 6 - 6 = -54 - 6 \ \Rightarrow\ 12x = -60 \]
\[ \frac{12x}{12} = \frac{-60}{12} \ \Rightarrow\ x = -5 \]
\[ 12\cdot(-5) + 6 = -60 + 6 = -54 \checkmark \]

Trying values of x in 12x + 6 = −54

x	12x + 6	Equals -54?
-7	-78	no
-6	-66	no
-5	-54	yes
-4	-42	no
-3	-30	no

Questions

What is x in 12x + 6 = −54?

The solution of 12x + 6 = −54 is x = -5.

How do you solve 12x + 6 = −54?

Subtract 6 from both sides to get 12x = -60, then divide both sides by 12 to get x = -5.

How do I check the answer?

Replace x by -5: 12(-5) + 6 = -54, which is -54.

Solve 12x + 6 = −54

How to work it out

Trying values of x in 12x + 6 = −54

Questions

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