Solve 12x − 4 = 188

The solution of 12x − 4 = 188 is x = 16.

12x - 4 = 188\ \Rightarrow\ x = 16

Explain it step by step in chat Make a short video of it

The lines y = 12x − 4 and y = 188 meet at x = 16. 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.
$12x - 4 = 188$
2
Add 4 to both sides:
$12x - 4 + 4 = 188 + 4 \ \Rightarrow\ 12x = 192$
3
Divide both sides by 12:
$\frac{12x}{12} = \frac{192}{12} \ \Rightarrow\ x = 16$
4
Check: put x = 16 back into the equation.
$12\cdot16 - 4 = 192 - 4 = 188 \checkmark$

LaTeX source of the formulas on this page

\[ 12x - 4 = 188\ \Rightarrow\ x = 16 \]
\[ 12x - 4 = 188 \]
\[ 12x - 4 + 4 = 188 + 4 \ \Rightarrow\ 12x = 192 \]
\[ \frac{12x}{12} = \frac{192}{12} \ \Rightarrow\ x = 16 \]
\[ 12\cdot16 - 4 = 192 - 4 = 188 \checkmark \]

Trying values of x in 12x − 4 = 188

x	12x − 4	Equals 188?
14	164	no
15	176	no
16	188	yes
17	200	no
18	212	no

Questions

What is x in 12x − 4 = 188?

The solution of 12x − 4 = 188 is x = 16.

How do you solve 12x − 4 = 188?

Add 4 to both sides to get 12x = 192, then divide both sides by 12 to get x = 16.

How do I check the answer?

Replace x by 16: 12(16) − 4 = 188, which is 188.

Solve 12x − 4 = 188

How to work it out

Trying values of x in 12x − 4 = 188

Questions

Similar equations