Solve 3x − 8 = −26

The solution of 3x − 8 = −26 is x = -6.

3x - 8 = -26\ \Rightarrow\ x = -6

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The lines y = 3x − 8 and y = -26 meet at x = -6. 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.
$3x - 8 = -26$
2
Add 8 to both sides:
$3x - 8 + 8 = -26 + 8 \ \Rightarrow\ 3x = -18$
3
Divide both sides by 3:
$\frac{3x}{3} = \frac{-18}{3} \ \Rightarrow\ x = -6$
4
Check: put x = -6 back into the equation.
$3\cdot(-6) - 8 = -18 - 8 = -26 \checkmark$

LaTeX source of the formulas on this page

\[ 3x - 8 = -26\ \Rightarrow\ x = -6 \]
\[ 3x - 8 = -26 \]
\[ 3x - 8 + 8 = -26 + 8 \ \Rightarrow\ 3x = -18 \]
\[ \frac{3x}{3} = \frac{-18}{3} \ \Rightarrow\ x = -6 \]
\[ 3\cdot(-6) - 8 = -18 - 8 = -26 \checkmark \]

Trying values of x in 3x − 8 = −26

x	3x − 8	Equals -26?
-8	-32	no
-7	-29	no
-6	-26	yes
-5	-23	no
-4	-20	no

Questions

What is x in 3x − 8 = −26?

The solution of 3x − 8 = −26 is x = -6.

How do you solve 3x − 8 = −26?

Add 8 to both sides to get 3x = -18, then divide both sides by 3 to get x = -6.

How do I check the answer?

Replace x by -6: 3(-6) − 8 = -26, which is -26.

Solve 3x − 8 = −26

How to work it out

Trying values of x in 3x − 8 = −26

Questions

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