Solve 2x − 1 = 29

The solution of 2x − 1 = 29 is x = 15.

2x - 1 = 29\ \Rightarrow\ x = 15

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The lines y = 2x − 1 and y = 29 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.
$2x - 1 = 29$
2
Add 1 to both sides:
$2x - 1 + 1 = 29 + 1 \ \Rightarrow\ 2x = 30$
3
Divide both sides by 2:
$\frac{2x}{2} = \frac{30}{2} \ \Rightarrow\ x = 15$
4
Check: put x = 15 back into the equation.
$2\cdot15 - 1 = 30 - 1 = 29 \checkmark$

LaTeX source of the formulas on this page

\[ 2x - 1 = 29\ \Rightarrow\ x = 15 \]
\[ 2x - 1 = 29 \]
\[ 2x - 1 + 1 = 29 + 1 \ \Rightarrow\ 2x = 30 \]
\[ \frac{2x}{2} = \frac{30}{2} \ \Rightarrow\ x = 15 \]
\[ 2\cdot15 - 1 = 30 - 1 = 29 \checkmark \]

Trying values of x in 2x − 1 = 29

x	2x − 1	Equals 29?
13	25	no
14	27	no
15	29	yes
16	31	no
17	33	no

Questions

What is x in 2x − 1 = 29?

The solution of 2x − 1 = 29 is x = 15.

How do you solve 2x − 1 = 29?

Add 1 to both sides to get 2x = 30, then divide both sides by 2 to get x = 15.

How do I check the answer?

Replace x by 15: 2(15) − 1 = 29, which is 29.

Solve 2x − 1 = 29

How to work it out

Trying values of x in 2x − 1 = 29

Questions

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