Solve 5x − 8 = −58

The solution of 5x − 8 = −58 is x = -10.

5x - 8 = -58\ \Rightarrow\ x = -10

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The lines y = 5x − 8 and y = -58 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.
$5x - 8 = -58$
2
Add 8 to both sides:
$5x - 8 + 8 = -58 + 8 \ \Rightarrow\ 5x = -50$
3
Divide both sides by 5:
$\frac{5x}{5} = \frac{-50}{5} \ \Rightarrow\ x = -10$
4
Check: put x = -10 back into the equation.
$5\cdot(-10) - 8 = -50 - 8 = -58 \checkmark$

LaTeX source of the formulas on this page

\[ 5x - 8 = -58\ \Rightarrow\ x = -10 \]
\[ 5x - 8 = -58 \]
\[ 5x - 8 + 8 = -58 + 8 \ \Rightarrow\ 5x = -50 \]
\[ \frac{5x}{5} = \frac{-50}{5} \ \Rightarrow\ x = -10 \]
\[ 5\cdot(-10) - 8 = -50 - 8 = -58 \checkmark \]

Trying values of x in 5x − 8 = −58

x	5x − 8	Equals -58?
-12	-68	no
-11	-63	no
-10	-58	yes
-9	-53	no
-8	-48	no

Questions

What is x in 5x − 8 = −58?

The solution of 5x − 8 = −58 is x = -10.

How do you solve 5x − 8 = −58?

Add 8 to both sides to get 5x = -50, then divide both sides by 5 to get x = -10.

How do I check the answer?

Replace x by -10: 5(-10) − 8 = -58, which is -58.

Solve 5x − 8 = −58

How to work it out

Trying values of x in 5x − 8 = −58

Questions

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