Solve 5x − 9 = −19

The solution of 5x − 9 = −19 is x = -2.

5x - 9 = -19\ \Rightarrow\ x = -2

Explain it step by step in chat Make a short video of it

The lines y = 5x − 9 and y = -19 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
The goal is to get x alone. Undo the operations in the opposite order: first the subtraction, then the multiplication.
$5x - 9 = -19$
2
Add 9 to both sides:
$5x - 9 + 9 = -19 + 9 \ \Rightarrow\ 5x = -10$
3
Divide both sides by 5:
$\frac{5x}{5} = \frac{-10}{5} \ \Rightarrow\ x = -2$
4
Check: put x = -2 back into the equation.
$5\cdot(-2) - 9 = -10 - 9 = -19 \checkmark$

LaTeX source of the formulas on this page

\[ 5x - 9 = -19\ \Rightarrow\ x = -2 \]
\[ 5x - 9 = -19 \]
\[ 5x - 9 + 9 = -19 + 9 \ \Rightarrow\ 5x = -10 \]
\[ \frac{5x}{5} = \frac{-10}{5} \ \Rightarrow\ x = -2 \]
\[ 5\cdot(-2) - 9 = -10 - 9 = -19 \checkmark \]

Trying values of x in 5x − 9 = −19

x	5x − 9	Equals -19?
-4	-29	no
-3	-24	no
-2	-19	yes
-1	-14	no
0	-9	no

Questions

What is x in 5x − 9 = −19?

The solution of 5x − 9 = −19 is x = -2.

How do you solve 5x − 9 = −19?

Add 9 to 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) − 9 = -19, which is -19.

Solve 5x − 9 = −19

How to work it out

Trying values of x in 5x − 9 = −19

Questions

Similar equations