Solve 7x + 2 = 93

The solution of 7x + 2 = 93 is x = 13.

7x + 2 = 93\ \Rightarrow\ x = 13

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The lines y = 7x + 2 and y = 93 meet at x = 13. 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 addition, then the multiplication.
$7x + 2 = 93$
2
Subtract 2 from both sides:
$7x + 2 - 2 = 93 - 2 \ \Rightarrow\ 7x = 91$
3
Divide both sides by 7:
$\frac{7x}{7} = \frac{91}{7} \ \Rightarrow\ x = 13$
4
Check: put x = 13 back into the equation.
$7\cdot13 + 2 = 91 + 2 = 93 \checkmark$

LaTeX source of the formulas on this page

\[ 7x + 2 = 93\ \Rightarrow\ x = 13 \]
\[ 7x + 2 = 93 \]
\[ 7x + 2 - 2 = 93 - 2 \ \Rightarrow\ 7x = 91 \]
\[ \frac{7x}{7} = \frac{91}{7} \ \Rightarrow\ x = 13 \]
\[ 7\cdot13 + 2 = 91 + 2 = 93 \checkmark \]

Trying values of x in 7x + 2 = 93

x	7x + 2	Equals 93?
11	79	no
12	86	no
13	93	yes
14	100	no
15	107	no

Questions

What is x in 7x + 2 = 93?

The solution of 7x + 2 = 93 is x = 13.

How do you solve 7x + 2 = 93?

Subtract 2 from both sides to get 7x = 91, then divide both sides by 7 to get x = 13.

How do I check the answer?

Replace x by 13: 7(13) + 2 = 93, which is 93.

Solve 7x + 2 = 93

How to work it out

Trying values of x in 7x + 2 = 93

Questions

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