Solve 4x − 2 = 54

The solution of 4x − 2 = 54 is x = 14.

4x - 2 = 54\ \Rightarrow\ x = 14

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The lines y = 4x − 2 and y = 54 meet at x = 14. 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.
$4x - 2 = 54$
2
Add 2 to both sides:
$4x - 2 + 2 = 54 + 2 \ \Rightarrow\ 4x = 56$
3
Divide both sides by 4:
$\frac{4x}{4} = \frac{56}{4} \ \Rightarrow\ x = 14$
4
Check: put x = 14 back into the equation.
$4\cdot14 - 2 = 56 - 2 = 54 \checkmark$

LaTeX source of the formulas on this page

\[ 4x - 2 = 54\ \Rightarrow\ x = 14 \]
\[ 4x - 2 = 54 \]
\[ 4x - 2 + 2 = 54 + 2 \ \Rightarrow\ 4x = 56 \]
\[ \frac{4x}{4} = \frac{56}{4} \ \Rightarrow\ x = 14 \]
\[ 4\cdot14 - 2 = 56 - 2 = 54 \checkmark \]

Trying values of x in 4x − 2 = 54

x	4x − 2	Equals 54?
12	46	no
13	50	no
14	54	yes
15	58	no
16	62	no

Questions

What is x in 4x − 2 = 54?

The solution of 4x − 2 = 54 is x = 14.

How do you solve 4x − 2 = 54?

Add 2 to both sides to get 4x = 56, then divide both sides by 4 to get x = 14.

How do I check the answer?

Replace x by 14: 4(14) − 2 = 54, which is 54.

Solve 4x − 2 = 54

How to work it out

Trying values of x in 4x − 2 = 54

Questions

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