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Solve 9x + 7 = 187

The solution of 9x + 7 = 187 is x = 20.

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The lines y = 9x + 7 and y = 187 meet at x = 2014161820222426140160180200220240x = 20y = 9x + 7y = 187
The lines y = 9x + 7 and y = 187 meet at x = 20. 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.

    9x+7=1879x + 7 = 187
  2. 2

    Subtract 7 from both sides:

    9x+7−7=187−7 ⇒ 9x=1809x + 7 - 7 = 187 - 7 \ \Rightarrow\ 9x = 180
  3. 3

    Divide both sides by 9:

    9x9=1809 ⇒ x=20\frac{9x}{9} = \frac{180}{9} \ \Rightarrow\ x = 20
  4. 4

    Check: put x = 20 back into the equation.

    9⋅20+7=180+7=187✓9\cdot20 + 7 = 180 + 7 = 187 \checkmark
LaTeX source of the formulas on this page
\[ 9x + 7 = 187\ \Rightarrow\ x = 20 \]
\[ 9x + 7 = 187 \]
\[ 9x + 7 - 7 = 187 - 7 \ \Rightarrow\ 9x = 180 \]
\[ \frac{9x}{9} = \frac{180}{9} \ \Rightarrow\ x = 20 \]
\[ 9\cdot20 + 7 = 180 + 7 = 187 \checkmark \]

Trying values of x in 9x + 7 = 187

x9x + 7Equals 187?
18169no
19178no
20187yes
21196no
22205no

Questions

What is x in 9x + 7 = 187?

The solution of 9x + 7 = 187 is x = 20.

How do you solve 9x + 7 = 187?

Subtract 7 from both sides to get 9x = 180, then divide both sides by 9 to get x = 20.

How do I check the answer?

Replace x by 20: 9(20) + 7 = 187, which is 187.

Similar equations

    Solve 9x + 7 = 187: x = 20 (steps and check) | WordGPT