Solve 4x − 1 = 23

The solution of 4x − 1 = 23 is x = 6.

4x - 1 = 23\ \Rightarrow\ x = 6

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The lines y = 4x − 1 and y = 23 meet at x = 6. 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.
$4x - 1 = 23$
2
Add 1 to both sides:
$4x - 1 + 1 = 23 + 1 \ \Rightarrow\ 4x = 24$
3
Divide both sides by 4:
$\frac{4x}{4} = \frac{24}{4} \ \Rightarrow\ x = 6$
4
Check: put x = 6 back into the equation.
$4\cdot6 - 1 = 24 - 1 = 23 \checkmark$

LaTeX source of the formulas on this page

\[ 4x - 1 = 23\ \Rightarrow\ x = 6 \]
\[ 4x - 1 = 23 \]
\[ 4x - 1 + 1 = 23 + 1 \ \Rightarrow\ 4x = 24 \]
\[ \frac{4x}{4} = \frac{24}{4} \ \Rightarrow\ x = 6 \]
\[ 4\cdot6 - 1 = 24 - 1 = 23 \checkmark \]

Trying values of x in 4x − 1 = 23

x	4x − 1	Equals 23?
4	15	no
5	19	no
6	23	yes
7	27	no
8	31	no

Questions

What is x in 4x − 1 = 23?

The solution of 4x − 1 = 23 is x = 6.

How do you solve 4x − 1 = 23?

Add 1 to both sides to get 4x = 24, then divide both sides by 4 to get x = 6.

How do I check the answer?

Replace x by 6: 4(6) − 1 = 23, which is 23.

Solve 4x − 1 = 23

How to work it out

Trying values of x in 4x − 1 = 23

Questions

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