Solve 7x − 4 = 52

The solution of 7x − 4 = 52 is x = 8.

7x - 4 = 52\ \Rightarrow\ x = 8

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The lines y = 7x − 4 and y = 52 meet at x = 8. 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.
$7x - 4 = 52$
2
Add 4 to both sides:
$7x - 4 + 4 = 52 + 4 \ \Rightarrow\ 7x = 56$
3
Divide both sides by 7:
$\frac{7x}{7} = \frac{56}{7} \ \Rightarrow\ x = 8$
4
Check: put x = 8 back into the equation.
$7\cdot8 - 4 = 56 - 4 = 52 \checkmark$

LaTeX source of the formulas on this page

\[ 7x - 4 = 52\ \Rightarrow\ x = 8 \]
\[ 7x - 4 = 52 \]
\[ 7x - 4 + 4 = 52 + 4 \ \Rightarrow\ 7x = 56 \]
\[ \frac{7x}{7} = \frac{56}{7} \ \Rightarrow\ x = 8 \]
\[ 7\cdot8 - 4 = 56 - 4 = 52 \checkmark \]

Trying values of x in 7x − 4 = 52

x	7x − 4	Equals 52?
6	38	no
7	45	no
8	52	yes
9	59	no
10	66	no

Questions

What is x in 7x − 4 = 52?

The solution of 7x − 4 = 52 is x = 8.

How do you solve 7x − 4 = 52?

Add 4 to both sides to get 7x = 56, then divide both sides by 7 to get x = 8.

How do I check the answer?

Replace x by 8: 7(8) − 4 = 52, which is 52.

Solve 7x − 4 = 52

How to work it out

Trying values of x in 7x − 4 = 52

Questions

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