Solve 5x − 11 = 29

The solution of 5x − 11 = 29 is x = 8.

5x - 11 = 29\ \Rightarrow\ x = 8

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The lines y = 5x − 11 and y = 29 meet at x = 8. 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.
$5x - 11 = 29$
2
Add 11 to both sides:
$5x - 11 + 11 = 29 + 11 \ \Rightarrow\ 5x = 40$
3
Divide both sides by 5:
$\frac{5x}{5} = \frac{40}{5} \ \Rightarrow\ x = 8$
4
Check: put x = 8 back into the equation.
$5\cdot8 - 11 = 40 - 11 = 29 \checkmark$

LaTeX source of the formulas on this page

\[ 5x - 11 = 29\ \Rightarrow\ x = 8 \]
\[ 5x - 11 = 29 \]
\[ 5x - 11 + 11 = 29 + 11 \ \Rightarrow\ 5x = 40 \]
\[ \frac{5x}{5} = \frac{40}{5} \ \Rightarrow\ x = 8 \]
\[ 5\cdot8 - 11 = 40 - 11 = 29 \checkmark \]

Trying values of x in 5x − 11 = 29

x	5x − 11	Equals 29?
6	19	no
7	24	no
8	29	yes
9	34	no
10	39	no

Questions

What is x in 5x − 11 = 29?

The solution of 5x − 11 = 29 is x = 8.

How do you solve 5x − 11 = 29?

Add 11 to both sides to get 5x = 40, then divide both sides by 5 to get x = 8.

How do I check the answer?

Replace x by 8: 5(8) − 11 = 29, which is 29.

Solve 5x − 11 = 29

How to work it out

Trying values of x in 5x − 11 = 29

Questions

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