Solve 9x + 8 = 26

The solution of 9x + 8 = 26 is x = 2.

9x + 8 = 26\ \Rightarrow\ x = 2

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The lines y = 9x + 8 and y = 26 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 addition, then the multiplication.
$9x + 8 = 26$
2
Subtract 8 from both sides:
$9x + 8 - 8 = 26 - 8 \ \Rightarrow\ 9x = 18$
3
Divide both sides by 9:
$\frac{9x}{9} = \frac{18}{9} \ \Rightarrow\ x = 2$
4
Check: put x = 2 back into the equation.
$9\cdot2 + 8 = 18 + 8 = 26 \checkmark$

LaTeX source of the formulas on this page

\[ 9x + 8 = 26\ \Rightarrow\ x = 2 \]
\[ 9x + 8 = 26 \]
\[ 9x + 8 - 8 = 26 - 8 \ \Rightarrow\ 9x = 18 \]
\[ \frac{9x}{9} = \frac{18}{9} \ \Rightarrow\ x = 2 \]
\[ 9\cdot2 + 8 = 18 + 8 = 26 \checkmark \]

Trying values of x in 9x + 8 = 26

x	9x + 8	Equals 26?
0	8	no
1	17	no
2	26	yes
3	35	no
4	44	no

Questions

What is x in 9x + 8 = 26?

The solution of 9x + 8 = 26 is x = 2.

How do you solve 9x + 8 = 26?

Subtract 8 from both sides to get 9x = 18, then divide both sides by 9 to get x = 2.

How do I check the answer?

Replace x by 2: 9(2) + 8 = 26, which is 26.

Solve 9x + 8 = 26

How to work it out

Trying values of x in 9x + 8 = 26

Questions

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