Solve 10x − 3 = −23

The solution of 10x − 3 = −23 is x = -2.

10x - 3 = -23\ \Rightarrow\ x = -2

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The lines y = 10x − 3 and y = -23 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.
$10x - 3 = -23$
2
Add 3 to both sides:
$10x - 3 + 3 = -23 + 3 \ \Rightarrow\ 10x = -20$
3
Divide both sides by 10:
$\frac{10x}{10} = \frac{-20}{10} \ \Rightarrow\ x = -2$
4
Check: put x = -2 back into the equation.
$10\cdot(-2) - 3 = -20 - 3 = -23 \checkmark$

LaTeX source of the formulas on this page

\[ 10x - 3 = -23\ \Rightarrow\ x = -2 \]
\[ 10x - 3 = -23 \]
\[ 10x - 3 + 3 = -23 + 3 \ \Rightarrow\ 10x = -20 \]
\[ \frac{10x}{10} = \frac{-20}{10} \ \Rightarrow\ x = -2 \]
\[ 10\cdot(-2) - 3 = -20 - 3 = -23 \checkmark \]

Trying values of x in 10x − 3 = −23

x	10x − 3	Equals -23?
-4	-43	no
-3	-33	no
-2	-23	yes
-1	-13	no
0	-3	no

Questions

What is x in 10x − 3 = −23?

The solution of 10x − 3 = −23 is x = -2.

How do you solve 10x − 3 = −23?

Add 3 to both sides to get 10x = -20, then divide both sides by 10 to get x = -2.

How do I check the answer?

Replace x by -2: 10(-2) − 3 = -23, which is -23.

Solve 10x − 3 = −23

How to work it out

Trying values of x in 10x − 3 = −23

Questions

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