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Goryan [66]
3 years ago
15

Solve the equation 3(x - 7) = 42

Mathematics
2 answers:
den301095 [7]3 years ago
7 0
X = 21

To solve the equation, follow these steps.

3(x-7) = 42
Distribute the three into the parenthesis:

3x - 21 = 42
Isolate the variable, x, by first doing the inverse operation: add 21 to both sides to cancel it out

3x = 63
Now to isolate the variable entirely, divide both sides by 3 as divide is the inverse of multiply.

x = 21

To check this, input 21 as x in the equation:

3 (21-7) = 42
Subtract 21 and 7:

3 (14) = 42

42 = 42

Hope this helps!
Effectus [21]3 years ago
6 0

Answer:

x=21.

Step-by-step explanation:

First you distribute 3 to the parenthesis. You should get 3x-21=42 at this point. Then you add 21 to 42 to get 63. Here you should be at 3x=63. Divide 63 by 3 to get x=3

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2 years ago
For which regular polygon is 30 degrees the smallest angle of rotational symmetry?
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<h3>answer.</h3>

•given that is smallest angle of rotational symmetry for a regular polygon is 30

•we have to find the number of side does the regular polygon have

•if we can rotate of figure around a center point be fewer than 360° and the figure appears and change then the figure has the rotation symmetry

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<em>I hope</em><em> </em><em>it's </em><em>help</em>

4 0
3 years ago
Read 2 more answers
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