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Solve 2x + 8 = 30

The solution of 2x + 8 = 30 is x = 11.

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The lines y = 2x + 8 and y = 30 meet at x = 1168101214162025303540x = 11y = 2x + 8y = 30
The lines y = 2x + 8 and y = 30 meet at x = 11. The solution of the equation is the x-coordinate of the point where the two sides are equal.

How to work it out

  1. 1

    The goal is to get x alone. Undo the operations in the opposite order: first the addition, then the multiplication.

    2x+8=302x + 8 = 30
  2. 2

    Subtract 8 from both sides:

    2x+8−8=30−8 ⇒ 2x=222x + 8 - 8 = 30 - 8 \ \Rightarrow\ 2x = 22
  3. 3

    Divide both sides by 2:

    2x2=222 ⇒ x=11\frac{2x}{2} = \frac{22}{2} \ \Rightarrow\ x = 11
  4. 4

    Check: put x = 11 back into the equation.

    2⋅11+8=22+8=30✓2\cdot11 + 8 = 22 + 8 = 30 \checkmark
LaTeX source of the formulas on this page
\[ 2x + 8 = 30\ \Rightarrow\ x = 11 \]
\[ 2x + 8 = 30 \]
\[ 2x + 8 - 8 = 30 - 8 \ \Rightarrow\ 2x = 22 \]
\[ \frac{2x}{2} = \frac{22}{2} \ \Rightarrow\ x = 11 \]
\[ 2\cdot11 + 8 = 22 + 8 = 30 \checkmark \]

Trying values of x in 2x + 8 = 30

x2x + 8Equals 30?
926no
1028no
1130yes
1232no
1334no

Questions

What is x in 2x + 8 = 30?

The solution of 2x + 8 = 30 is x = 11.

How do you solve 2x + 8 = 30?

Subtract 8 from both sides to get 2x = 22, then divide both sides by 2 to get x = 11.

How do I check the answer?

Replace x by 11: 2(11) + 8 = 30, which is 30.

Similar equations

    Solve 2x + 8 = 30: x = 11 (steps and check) | WordGPT