Solve 2x + 10 = −4

The solution of 2x + 10 = −4 is x = -7.

2x + 10 = -4\ \Rightarrow\ x = -7

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The lines y = 2x + 10 and y = -4 meet at x = -7. 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.
$2x + 10 = -4$
2
Subtract 10 from both sides:
$2x + 10 - 10 = -4 - 10 \ \Rightarrow\ 2x = -14$
3
Divide both sides by 2:
$\frac{2x}{2} = \frac{-14}{2} \ \Rightarrow\ x = -7$
4
Check: put x = -7 back into the equation.
$2\cdot(-7) + 10 = -14 + 10 = -4 \checkmark$

LaTeX source of the formulas on this page

\[ 2x + 10 = -4\ \Rightarrow\ x = -7 \]
\[ 2x + 10 = -4 \]
\[ 2x + 10 - 10 = -4 - 10 \ \Rightarrow\ 2x = -14 \]
\[ \frac{2x}{2} = \frac{-14}{2} \ \Rightarrow\ x = -7 \]
\[ 2\cdot(-7) + 10 = -14 + 10 = -4 \checkmark \]

Trying values of x in 2x + 10 = −4

x	2x + 10	Equals -4?
-9	-8	no
-8	-6	no
-7	-4	yes
-6	-2	no
-5	0	no

Questions

What is x in 2x + 10 = −4?

The solution of 2x + 10 = −4 is x = -7.

How do you solve 2x + 10 = −4?

Subtract 10 from both sides to get 2x = -14, then divide both sides by 2 to get x = -7.

How do I check the answer?

Replace x by -7: 2(-7) + 10 = -4, which is -4.

Solve 2x + 10 = −4

How to work it out

Trying values of x in 2x + 10 = −4

Questions

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