Solve 10x − 4 = −104

The solution of 10x − 4 = −104 is x = -10.

10x - 4 = -104\ \Rightarrow\ x = -10

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The lines y = 10x − 4 and y = -104 meet at x = -10. 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.
$10x - 4 = -104$
2
Add 4 to both sides:
$10x - 4 + 4 = -104 + 4 \ \Rightarrow\ 10x = -100$
3
Divide both sides by 10:
$\frac{10x}{10} = \frac{-100}{10} \ \Rightarrow\ x = -10$
4
Check: put x = -10 back into the equation.
$10\cdot(-10) - 4 = -100 - 4 = -104 \checkmark$

LaTeX source of the formulas on this page

\[ 10x - 4 = -104\ \Rightarrow\ x = -10 \]
\[ 10x - 4 = -104 \]
\[ 10x - 4 + 4 = -104 + 4 \ \Rightarrow\ 10x = -100 \]
\[ \frac{10x}{10} = \frac{-100}{10} \ \Rightarrow\ x = -10 \]
\[ 10\cdot(-10) - 4 = -100 - 4 = -104 \checkmark \]

Trying values of x in 10x − 4 = −104

x	10x − 4	Equals -104?
-12	-124	no
-11	-114	no
-10	-104	yes
-9	-94	no
-8	-84	no

Questions

What is x in 10x − 4 = −104?

The solution of 10x − 4 = −104 is x = -10.

How do you solve 10x − 4 = −104?

Add 4 to both sides to get 10x = -100, then divide both sides by 10 to get x = -10.

How do I check the answer?

Replace x by -10: 10(-10) − 4 = -104, which is -104.

Solve 10x − 4 = −104

How to work it out

Trying values of x in 10x − 4 = −104

Questions

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