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Solve 2x + 10 = 30

The solution of 2x + 10 = 30 is x = 10.

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The lines y = 2x + 10 and y = 30 meet at x = 10468101214162025303540x = 10y = 2x + 10y = 30
The lines y = 2x + 10 and y = 30 meet at x = 10. 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+10=302x + 10 = 30
  2. 2

    Subtract 10 from both sides:

    2x+10−10=30−10 ⇒ 2x=202x + 10 - 10 = 30 - 10 \ \Rightarrow\ 2x = 20
  3. 3

    Divide both sides by 2:

    2x2=202 ⇒ x=10\frac{2x}{2} = \frac{20}{2} \ \Rightarrow\ x = 10
  4. 4

    Check: put x = 10 back into the equation.

    2⋅10+10=20+10=30✓2\cdot10 + 10 = 20 + 10 = 30 \checkmark
LaTeX source of the formulas on this page
\[ 2x + 10 = 30\ \Rightarrow\ x = 10 \]
\[ 2x + 10 = 30 \]
\[ 2x + 10 - 10 = 30 - 10 \ \Rightarrow\ 2x = 20 \]
\[ \frac{2x}{2} = \frac{20}{2} \ \Rightarrow\ x = 10 \]
\[ 2\cdot10 + 10 = 20 + 10 = 30 \checkmark \]

Trying values of x in 2x + 10 = 30

x2x + 10Equals 30?
826no
928no
1030yes
1132no
1234no

Questions

What is x in 2x + 10 = 30?

The solution of 2x + 10 = 30 is x = 10.

How do you solve 2x + 10 = 30?

Subtract 10 from both sides to get 2x = 20, then divide both sides by 2 to get x = 10.

How do I check the answer?

Replace x by 10: 2(10) + 10 = 30, which is 30.

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    Solve 2x + 10 = 30: x = 10 (steps and check) | WordGPT