Solve 11x − 8 = −85

The solution of 11x − 8 = −85 is x = -7.

11x - 8 = -85\ \Rightarrow\ x = -7

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The lines y = 11x − 8 and y = -85 meet at x = -7. 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.
$11x - 8 = -85$
2
Add 8 to both sides:
$11x - 8 + 8 = -85 + 8 \ \Rightarrow\ 11x = -77$
3
Divide both sides by 11:
$\frac{11x}{11} = \frac{-77}{11} \ \Rightarrow\ x = -7$
4
Check: put x = -7 back into the equation.
$11\cdot(-7) - 8 = -77 - 8 = -85 \checkmark$

LaTeX source of the formulas on this page

\[ 11x - 8 = -85\ \Rightarrow\ x = -7 \]
\[ 11x - 8 = -85 \]
\[ 11x - 8 + 8 = -85 + 8 \ \Rightarrow\ 11x = -77 \]
\[ \frac{11x}{11} = \frac{-77}{11} \ \Rightarrow\ x = -7 \]
\[ 11\cdot(-7) - 8 = -77 - 8 = -85 \checkmark \]

Trying values of x in 11x − 8 = −85

x	11x − 8	Equals -85?
-9	-107	no
-8	-96	no
-7	-85	yes
-6	-74	no
-5	-63	no

Questions

What is x in 11x − 8 = −85?

The solution of 11x − 8 = −85 is x = -7.

How do you solve 11x − 8 = −85?

Add 8 to both sides to get 11x = -77, then divide both sides by 11 to get x = -7.

How do I check the answer?

Replace x by -7: 11(-7) − 8 = -85, which is -85.

Solve 11x − 8 = −85

How to work it out

Trying values of x in 11x − 8 = −85

Questions

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