Solve 11x − 4 = 161

The solution of 11x − 4 = 161 is x = 15.

11x - 4 = 161\ \Rightarrow\ x = 15

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The lines y = 11x − 4 and y = 161 meet at x = 15. 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.
$11x - 4 = 161$
2
Add 4 to both sides:
$11x - 4 + 4 = 161 + 4 \ \Rightarrow\ 11x = 165$
3
Divide both sides by 11:
$\frac{11x}{11} = \frac{165}{11} \ \Rightarrow\ x = 15$
4
Check: put x = 15 back into the equation.
$11\cdot15 - 4 = 165 - 4 = 161 \checkmark$

LaTeX source of the formulas on this page

\[ 11x - 4 = 161\ \Rightarrow\ x = 15 \]
\[ 11x - 4 = 161 \]
\[ 11x - 4 + 4 = 161 + 4 \ \Rightarrow\ 11x = 165 \]
\[ \frac{11x}{11} = \frac{165}{11} \ \Rightarrow\ x = 15 \]
\[ 11\cdot15 - 4 = 165 - 4 = 161 \checkmark \]

Trying values of x in 11x − 4 = 161

x	11x − 4	Equals 161?
13	139	no
14	150	no
15	161	yes
16	172	no
17	183	no

Questions

What is x in 11x − 4 = 161?

The solution of 11x − 4 = 161 is x = 15.

How do you solve 11x − 4 = 161?

Add 4 to both sides to get 11x = 165, then divide both sides by 11 to get x = 15.

How do I check the answer?

Replace x by 15: 11(15) − 4 = 161, which is 161.

Solve 11x − 4 = 161

How to work it out

Trying values of x in 11x − 4 = 161

Questions

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