Solve 3x + 10 = −5

The solution of 3x + 10 = −5 is x = -5.

3x + 10 = -5\ \Rightarrow\ x = -5

Explain it step by step in chat Make a short video of it

The lines y = 3x + 10 and y = -5 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.
$3x + 10 = -5$
2
Subtract 10 from both sides:
$3x + 10 - 10 = -5 - 10 \ \Rightarrow\ 3x = -15$
3
Divide both sides by 3:
$\frac{3x}{3} = \frac{-15}{3} \ \Rightarrow\ x = -5$
4
Check: put x = -5 back into the equation.
$3\cdot(-5) + 10 = -15 + 10 = -5 \checkmark$

LaTeX source of the formulas on this page

\[ 3x + 10 = -5\ \Rightarrow\ x = -5 \]
\[ 3x + 10 = -5 \]
\[ 3x + 10 - 10 = -5 - 10 \ \Rightarrow\ 3x = -15 \]
\[ \frac{3x}{3} = \frac{-15}{3} \ \Rightarrow\ x = -5 \]
\[ 3\cdot(-5) + 10 = -15 + 10 = -5 \checkmark \]

Trying values of x in 3x + 10 = −5

x	3x + 10	Equals -5?
-7	-11	no
-6	-8	no
-5	-5	yes
-4	-2	no
-3	1	no

Questions

What is x in 3x + 10 = −5?

The solution of 3x + 10 = −5 is x = -5.

How do you solve 3x + 10 = −5?

Subtract 10 from both sides to get 3x = -15, then divide both sides by 3 to get x = -5.

How do I check the answer?

Replace x by -5: 3(-5) + 10 = -5, which is -5.

Solve 3x + 10 = −5

How to work it out

Trying values of x in 3x + 10 = −5

Questions

Similar equations