Solve 7x − 2 = 61

The solution of 7x − 2 = 61 is x = 9.

7x - 2 = 61\ \Rightarrow\ x = 9

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The lines y = 7x − 2 and y = 61 meet at x = 9. 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.
$7x - 2 = 61$
2
Add 2 to both sides:
$7x - 2 + 2 = 61 + 2 \ \Rightarrow\ 7x = 63$
3
Divide both sides by 7:
$\frac{7x}{7} = \frac{63}{7} \ \Rightarrow\ x = 9$
4
Check: put x = 9 back into the equation.
$7\cdot9 - 2 = 63 - 2 = 61 \checkmark$

LaTeX source of the formulas on this page

\[ 7x - 2 = 61\ \Rightarrow\ x = 9 \]
\[ 7x - 2 = 61 \]
\[ 7x - 2 + 2 = 61 + 2 \ \Rightarrow\ 7x = 63 \]
\[ \frac{7x}{7} = \frac{63}{7} \ \Rightarrow\ x = 9 \]
\[ 7\cdot9 - 2 = 63 - 2 = 61 \checkmark \]

Trying values of x in 7x − 2 = 61

x	7x − 2	Equals 61?
7	47	no
8	54	no
9	61	yes
10	68	no
11	75	no

Questions

What is x in 7x − 2 = 61?

The solution of 7x − 2 = 61 is x = 9.

How do you solve 7x − 2 = 61?

Add 2 to both sides to get 7x = 63, then divide both sides by 7 to get x = 9.

How do I check the answer?

Replace x by 9: 7(9) − 2 = 61, which is 61.

Solve 7x − 2 = 61

How to work it out

Trying values of x in 7x − 2 = 61

Questions

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