Solve 5x + 13 = −27

The solution of 5x + 13 = −27 is x = -8.

5x + 13 = -27\ \Rightarrow\ x = -8

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The lines y = 5x + 13 and y = -27 meet at x = -8. 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 addition, then the multiplication.
$5x + 13 = -27$
2
Subtract 13 from both sides:
$5x + 13 - 13 = -27 - 13 \ \Rightarrow\ 5x = -40$
3
Divide both sides by 5:
$\frac{5x}{5} = \frac{-40}{5} \ \Rightarrow\ x = -8$
4
Check: put x = -8 back into the equation.
$5\cdot(-8) + 13 = -40 + 13 = -27 \checkmark$

LaTeX source of the formulas on this page

\[ 5x + 13 = -27\ \Rightarrow\ x = -8 \]
\[ 5x + 13 = -27 \]
\[ 5x + 13 - 13 = -27 - 13 \ \Rightarrow\ 5x = -40 \]
\[ \frac{5x}{5} = \frac{-40}{5} \ \Rightarrow\ x = -8 \]
\[ 5\cdot(-8) + 13 = -40 + 13 = -27 \checkmark \]

Trying values of x in 5x + 13 = −27

x	5x + 13	Equals -27?
-10	-37	no
-9	-32	no
-8	-27	yes
-7	-22	no
-6	-17	no

Questions

What is x in 5x + 13 = −27?

The solution of 5x + 13 = −27 is x = -8.

How do you solve 5x + 13 = −27?

Subtract 13 from both sides to get 5x = -40, then divide both sides by 5 to get x = -8.

How do I check the answer?

Replace x by -8: 5(-8) + 13 = -27, which is -27.

Solve 5x + 13 = −27

How to work it out

Trying values of x in 5x + 13 = −27

Questions

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