Solve 6x − 3 = 9

The solution of 6x − 3 = 9 is x = 2.

6x - 3 = 9\ \Rightarrow\ x = 2

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The lines y = 6x − 3 and y = 9 meet at x = 2. 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.
$6x - 3 = 9$
2
Add 3 to both sides:
$6x - 3 + 3 = 9 + 3 \ \Rightarrow\ 6x = 12$
3
Divide both sides by 6:
$\frac{6x}{6} = \frac{12}{6} \ \Rightarrow\ x = 2$
4
Check: put x = 2 back into the equation.
$6\cdot2 - 3 = 12 - 3 = 9 \checkmark$

LaTeX source of the formulas on this page

\[ 6x - 3 = 9\ \Rightarrow\ x = 2 \]
\[ 6x - 3 = 9 \]
\[ 6x - 3 + 3 = 9 + 3 \ \Rightarrow\ 6x = 12 \]
\[ \frac{6x}{6} = \frac{12}{6} \ \Rightarrow\ x = 2 \]
\[ 6\cdot2 - 3 = 12 - 3 = 9 \checkmark \]

Trying values of x in 6x − 3 = 9

x	6x − 3	Equals 9?
0	-3	no
1	3	no
2	9	yes
3	15	no
4	21	no

Questions

What is x in 6x − 3 = 9?

The solution of 6x − 3 = 9 is x = 2.

How do you solve 6x − 3 = 9?

Add 3 to both sides to get 6x = 12, then divide both sides by 6 to get x = 2.

How do I check the answer?

Replace x by 2: 6(2) − 3 = 9, which is 9.

Solve 6x − 3 = 9

How to work it out

Trying values of x in 6x − 3 = 9

Questions

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