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Solve 5x + 15 = 5

The solution of 5x + 15 = 5 is x = -2.

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The lines y = 5x + 15 and y = 5 meet at x = -2-8-6-4-224-30-20-1010203040x = -2y = 5x + 15y = 5
The lines y = 5x + 15 and y = 5 meet at x = -2. 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.

    5x+15=55x + 15 = 5
  2. 2

    Subtract 15 from both sides:

    5x+15−15=5−15 ⇒ 5x=−105x + 15 - 15 = 5 - 15 \ \Rightarrow\ 5x = -10
  3. 3

    Divide both sides by 5:

    5x5=−105 ⇒ x=−2\frac{5x}{5} = \frac{-10}{5} \ \Rightarrow\ x = -2
  4. 4

    Check: put x = -2 back into the equation.

    5⋅(−2)+15=−10+15=5✓5\cdot(-2) + 15 = -10 + 15 = 5 \checkmark
LaTeX source of the formulas on this page
\[ 5x + 15 = 5\ \Rightarrow\ x = -2 \]
\[ 5x + 15 = 5 \]
\[ 5x + 15 - 15 = 5 - 15 \ \Rightarrow\ 5x = -10 \]
\[ \frac{5x}{5} = \frac{-10}{5} \ \Rightarrow\ x = -2 \]
\[ 5\cdot(-2) + 15 = -10 + 15 = 5 \checkmark \]

Trying values of x in 5x + 15 = 5

x5x + 15Equals 5?
-4-5no
-30no
-25yes
-110no
015no

Questions

What is x in 5x + 15 = 5?

The solution of 5x + 15 = 5 is x = -2.

How do you solve 5x + 15 = 5?

Subtract 15 from both sides to get 5x = -10, then divide both sides by 5 to get x = -2.

How do I check the answer?

Replace x by -2: 5(-2) + 15 = 5, which is 5.

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    Solve 5x + 15 = 5: x = -2 (steps and check) | WordGPT