Solve 9x + 13 = −32

The solution of 9x + 13 = −32 is x = -5.

9x + 13 = -32\ \Rightarrow\ x = -5

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The lines y = 9x + 13 and y = -32 meet at x = -5. 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.
$9x + 13 = -32$
2
Subtract 13 from both sides:
$9x + 13 - 13 = -32 - 13 \ \Rightarrow\ 9x = -45$
3
Divide both sides by 9:
$\frac{9x}{9} = \frac{-45}{9} \ \Rightarrow\ x = -5$
4
Check: put x = -5 back into the equation.
$9\cdot(-5) + 13 = -45 + 13 = -32 \checkmark$

LaTeX source of the formulas on this page

\[ 9x + 13 = -32\ \Rightarrow\ x = -5 \]
\[ 9x + 13 = -32 \]
\[ 9x + 13 - 13 = -32 - 13 \ \Rightarrow\ 9x = -45 \]
\[ \frac{9x}{9} = \frac{-45}{9} \ \Rightarrow\ x = -5 \]
\[ 9\cdot(-5) + 13 = -45 + 13 = -32 \checkmark \]

Trying values of x in 9x + 13 = −32

x	9x + 13	Equals -32?
-7	-50	no
-6	-41	no
-5	-32	yes
-4	-23	no
-3	-14	no

Questions

What is x in 9x + 13 = −32?

The solution of 9x + 13 = −32 is x = -5.

How do you solve 9x + 13 = −32?

Subtract 13 from both sides to get 9x = -45, then divide both sides by 9 to get x = -5.

How do I check the answer?

Replace x by -5: 9(-5) + 13 = -32, which is -32.

Solve 9x + 13 = −32

How to work it out

Trying values of x in 9x + 13 = −32

Questions

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