Solve 7x − 11 = 10

The solution of 7x − 11 = 10 is x = 3.

7x - 11 = 10\ \Rightarrow\ x = 3

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The lines y = 7x − 11 and y = 10 meet at x = 3. 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.
$7x - 11 = 10$
2
Add 11 to both sides:
$7x - 11 + 11 = 10 + 11 \ \Rightarrow\ 7x = 21$
3
Divide both sides by 7:
$\frac{7x}{7} = \frac{21}{7} \ \Rightarrow\ x = 3$
4
Check: put x = 3 back into the equation.
$7\cdot3 - 11 = 21 - 11 = 10 \checkmark$

LaTeX source of the formulas on this page

\[ 7x - 11 = 10\ \Rightarrow\ x = 3 \]
\[ 7x - 11 = 10 \]
\[ 7x - 11 + 11 = 10 + 11 \ \Rightarrow\ 7x = 21 \]
\[ \frac{7x}{7} = \frac{21}{7} \ \Rightarrow\ x = 3 \]
\[ 7\cdot3 - 11 = 21 - 11 = 10 \checkmark \]

Trying values of x in 7x − 11 = 10

x	7x − 11	Equals 10?
1	-4	no
2	3	no
3	10	yes
4	17	no
5	24	no

Questions

What is x in 7x − 11 = 10?

The solution of 7x − 11 = 10 is x = 3.

How do you solve 7x − 11 = 10?

Add 11 to both sides to get 7x = 21, then divide both sides by 7 to get x = 3.

How do I check the answer?

Replace x by 3: 7(3) − 11 = 10, which is 10.

Solve 7x − 11 = 10

How to work it out

Trying values of x in 7x − 11 = 10

Questions

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