Solve 6x − 6 = −66

The solution of 6x − 6 = −66 is x = -10.

6x - 6 = -66\ \Rightarrow\ x = -10

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The lines y = 6x − 6 and y = -66 meet at x = -10. 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.
$6x - 6 = -66$
2
Add 6 to both sides:
$6x - 6 + 6 = -66 + 6 \ \Rightarrow\ 6x = -60$
3
Divide both sides by 6:
$\frac{6x}{6} = \frac{-60}{6} \ \Rightarrow\ x = -10$
4
Check: put x = -10 back into the equation.
$6\cdot(-10) - 6 = -60 - 6 = -66 \checkmark$

LaTeX source of the formulas on this page

\[ 6x - 6 = -66\ \Rightarrow\ x = -10 \]
\[ 6x - 6 = -66 \]
\[ 6x - 6 + 6 = -66 + 6 \ \Rightarrow\ 6x = -60 \]
\[ \frac{6x}{6} = \frac{-60}{6} \ \Rightarrow\ x = -10 \]
\[ 6\cdot(-10) - 6 = -60 - 6 = -66 \checkmark \]

Trying values of x in 6x − 6 = −66

x	6x − 6	Equals -66?
-12	-78	no
-11	-72	no
-10	-66	yes
-9	-60	no
-8	-54	no

Questions

What is x in 6x − 6 = −66?

The solution of 6x − 6 = −66 is x = -10.

How do you solve 6x − 6 = −66?

Add 6 to both sides to get 6x = -60, then divide both sides by 6 to get x = -10.

How do I check the answer?

Replace x by -10: 6(-10) − 6 = -66, which is -66.

Solve 6x − 6 = −66

How to work it out

Trying values of x in 6x − 6 = −66

Questions

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