Solve 11x + 9 = −2

The solution of 11x + 9 = −2 is x = -1.

11x + 9 = -2\ \Rightarrow\ x = -1

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The lines y = 11x + 9 and y = -2 meet at x = -1. 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.
$11x + 9 = -2$
2
Subtract 9 from both sides:
$11x + 9 - 9 = -2 - 9 \ \Rightarrow\ 11x = -11$
3
Divide both sides by 11:
$\frac{11x}{11} = \frac{-11}{11} \ \Rightarrow\ x = -1$
4
Check: put x = -1 back into the equation.
$11\cdot(-1) + 9 = -11 + 9 = -2 \checkmark$

LaTeX source of the formulas on this page

\[ 11x + 9 = -2\ \Rightarrow\ x = -1 \]
\[ 11x + 9 = -2 \]
\[ 11x + 9 - 9 = -2 - 9 \ \Rightarrow\ 11x = -11 \]
\[ \frac{11x}{11} = \frac{-11}{11} \ \Rightarrow\ x = -1 \]
\[ 11\cdot(-1) + 9 = -11 + 9 = -2 \checkmark \]

Trying values of x in 11x + 9 = −2

x	11x + 9	Equals -2?
-3	-24	no
-2	-13	no
-1	-2	yes
0	9	no
1	20	no

Questions

What is x in 11x + 9 = −2?

The solution of 11x + 9 = −2 is x = -1.

How do you solve 11x + 9 = −2?

Subtract 9 from both sides to get 11x = -11, then divide both sides by 11 to get x = -1.

How do I check the answer?

Replace x by -1: 11(-1) + 9 = -2, which is -2.

Solve 11x + 9 = −2

How to work it out

Trying values of x in 11x + 9 = −2

Questions

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