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Solve 10x + 9 = 19

The solution of 10x + 9 = 19 is x = 1.

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The lines y = 10x + 9 and y = 19 meet at x = 1-4-2246-40-2020406080x = 1y = 10x + 9y = 19
The lines y = 10x + 9 and y = 19 meet at x = 1. 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=1910x + 9 = 19
  2. 2

    Subtract 9 from both sides:

    10x+9−9=19−9 ⇒ 10x=1010x + 9 - 9 = 19 - 9 \ \Rightarrow\ 10x = 10
  3. 3

    Divide both sides by 10:

    10x10=1010 ⇒ x=1\frac{10x}{10} = \frac{10}{10} \ \Rightarrow\ x = 1
  4. 4

    Check: put x = 1 back into the equation.

    10⋅1+9=10+9=19✓10\cdot1 + 9 = 10 + 9 = 19 \checkmark
LaTeX source of the formulas on this page
\[ 10x + 9 = 19\ \Rightarrow\ x = 1 \]
\[ 10x + 9 = 19 \]
\[ 10x + 9 - 9 = 19 - 9 \ \Rightarrow\ 10x = 10 \]
\[ \frac{10x}{10} = \frac{10}{10} \ \Rightarrow\ x = 1 \]
\[ 10\cdot1 + 9 = 10 + 9 = 19 \checkmark \]

Trying values of x in 10x + 9 = 19

x10x + 9Equals 19?
-1-1no
09no
119yes
229no
339no

Questions

What is x in 10x + 9 = 19?

The solution of 10x + 9 = 19 is x = 1.

How do you solve 10x + 9 = 19?

Subtract 9 from both sides to get 10x = 10, then divide both sides by 10 to get x = 1.

How do I check the answer?

Replace x by 1: 10(1) + 9 = 19, which is 19.

Similar equations

    Solve 10x + 9 = 19: x = 1 (steps and check) | WordGPT