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Solve 10x + 9 = 179

The solution of 10x + 9 = 179 is x = 17.

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The lines y = 10x + 9 and y = 179 meet at x = 17121416182022120140160180200220240x = 17y = 10x + 9y = 179
The lines y = 10x + 9 and y = 179 meet at x = 17. 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+9=17910x + 9 = 179
  2. 2

    Subtract 9 from both sides:

    10x+9−9=179−9 ⇒ 10x=17010x + 9 - 9 = 179 - 9 \ \Rightarrow\ 10x = 170
  3. 3

    Divide both sides by 10:

    10x10=17010 ⇒ x=17\frac{10x}{10} = \frac{170}{10} \ \Rightarrow\ x = 17
  4. 4

    Check: put x = 17 back into the equation.

    10⋅17+9=170+9=179✓10\cdot17 + 9 = 170 + 9 = 179 \checkmark
LaTeX source of the formulas on this page
\[ 10x + 9 = 179\ \Rightarrow\ x = 17 \]
\[ 10x + 9 = 179 \]
\[ 10x + 9 - 9 = 179 - 9 \ \Rightarrow\ 10x = 170 \]
\[ \frac{10x}{10} = \frac{170}{10} \ \Rightarrow\ x = 17 \]
\[ 10\cdot17 + 9 = 170 + 9 = 179 \checkmark \]

Trying values of x in 10x + 9 = 179

x10x + 9Equals 179?
15159no
16169no
17179yes
18189no
19199no

Questions

What is x in 10x + 9 = 179?

The solution of 10x + 9 = 179 is x = 17.

How do you solve 10x + 9 = 179?

Subtract 9 from both sides to get 10x = 170, then divide both sides by 10 to get x = 17.

How do I check the answer?

Replace x by 17: 10(17) + 9 = 179, which is 179.

Similar equations

    Solve 10x + 9 = 179: x = 17 (steps and check) | WordGPT