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Solve 10x + 13 = 143

The solution of 10x + 13 = 143 is x = 13.

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The lines y = 10x + 13 and y = 143 meet at x = 138101214161880100120140160180200x = 13y = 10x + 13y = 143
The lines y = 10x + 13 and y = 143 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. 1

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

    10x+13=14310x + 13 = 143
  2. 2

    Subtract 13 from both sides:

    10x+13−13=143−13 ⇒ 10x=13010x + 13 - 13 = 143 - 13 \ \Rightarrow\ 10x = 130
  3. 3

    Divide both sides by 10:

    10x10=13010 ⇒ x=13\frac{10x}{10} = \frac{130}{10} \ \Rightarrow\ x = 13
  4. 4

    Check: put x = 13 back into the equation.

    10⋅13+13=130+13=143✓10\cdot13 + 13 = 130 + 13 = 143 \checkmark
LaTeX source of the formulas on this page
\[ 10x + 13 = 143\ \Rightarrow\ x = 13 \]
\[ 10x + 13 = 143 \]
\[ 10x + 13 - 13 = 143 - 13 \ \Rightarrow\ 10x = 130 \]
\[ \frac{10x}{10} = \frac{130}{10} \ \Rightarrow\ x = 13 \]
\[ 10\cdot13 + 13 = 130 + 13 = 143 \checkmark \]

Trying values of x in 10x + 13 = 143

x10x + 13Equals 143?
11123no
12133no
13143yes
14153no
15163no

Questions

What is x in 10x + 13 = 143?

The solution of 10x + 13 = 143 is x = 13.

How do you solve 10x + 13 = 143?

Subtract 13 from both sides to get 10x = 130, then divide both sides by 10 to get x = 13.

How do I check the answer?

Replace x by 13: 10(13) + 13 = 143, which is 143.

Similar equations

    Solve 10x + 13 = 143: x = 13 (steps and check) | WordGPT