Solve 8x + 2 = −14

The solution of 8x + 2 = −14 is x = -2.

8x + 2 = -14\ \Rightarrow\ x = -2

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The lines y = 8x + 2 and y = -14 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 addition, then the multiplication.
$8x + 2 = -14$
2
Subtract 2 from both sides:
$8x + 2 - 2 = -14 - 2 \ \Rightarrow\ 8x = -16$
3
Divide both sides by 8:
$\frac{8x}{8} = \frac{-16}{8} \ \Rightarrow\ x = -2$
4
Check: put x = -2 back into the equation.
$8\cdot(-2) + 2 = -16 + 2 = -14 \checkmark$

LaTeX source of the formulas on this page

\[ 8x + 2 = -14\ \Rightarrow\ x = -2 \]
\[ 8x + 2 = -14 \]
\[ 8x + 2 - 2 = -14 - 2 \ \Rightarrow\ 8x = -16 \]
\[ \frac{8x}{8} = \frac{-16}{8} \ \Rightarrow\ x = -2 \]
\[ 8\cdot(-2) + 2 = -16 + 2 = -14 \checkmark \]

Trying values of x in 8x + 2 = −14

x	8x + 2	Equals -14?
-4	-30	no
-3	-22	no
-2	-14	yes
-1	-6	no
0	2	no

Questions

What is x in 8x + 2 = −14?

The solution of 8x + 2 = −14 is x = -2.

How do you solve 8x + 2 = −14?

Subtract 2 from both sides to get 8x = -16, then divide both sides by 8 to get x = -2.

How do I check the answer?

Replace x by -2: 8(-2) + 2 = -14, which is -14.

Solve 8x + 2 = −14

How to work it out

Trying values of x in 8x + 2 = −14

Questions

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