3 years ago

Solve for x in the equation 3x + 8 = x - 12.

Mathematics

2 answers:

Yuliya22 [10]3 years ago

5 0

Answer:

x = -10

Step-by-step explanation:

Combine like terms and solve for x

3x + 8 = x - 12

3x= x - 20

2x = -20

x = -10

Drupady [299]3 years ago

3 0

Answer:

The answer is x = -10

Step-by-step explanation:

3 x -10 + 8= -22

-10 - 12 = -22

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Find the distance between the points given. (-10, 3) and (-10, 12) 9 15

Novosadov [1.4K]

The distance between the points (x₁,y₁) and (x₂,y₂):
$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

$(-10,3) \\
x_1=-10 \\ y_1=3 \\ \\ (-10,12) \\ x_2=-10 \\ y_2=12 \\ \\
d=\sqrt{(-10+10)^2+(12-3)^2}=\sqrt{0+9^2}=\sqrt{9^2}=9$

Another method:
The points have the same x-coordinate so they lie on the same line. y-coordinates are positive so you just subtract 3 from 12. See the picture in the attachment.

The answer is 9.