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marusya05 [52]
3 years ago
8

Solve for x: 20 = 3x -1

Mathematics
2 answers:
Feliz [49]3 years ago
7 0

20=3x-1

move -1 to the other side

sign changes from -1 to +1

20+1=3x-1+1

20+1=3x

21=3x

divide both sides by 3 to get x by itself

21/3=3/3x

Cross out 3 and 3, divide by 3 and then becomes 1*1*x=x

21/3=x

Answer:

x=7

Stells [14]3 years ago
3 0

Answer:

Let’s solve your equation step-by step.

20=3x-1

Step 1:flip the equation.

3x-1=20

Step 2:Add 1 to both sides.

3x-1+1=20+1

3x=21

Step 3:divide both sides by 3.

3x/3=21/3

X=7

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Answer:

3 tiles will not fit together.

Step-by-step explanation:

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Here, n = number of sides of the polygon

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To fit the given three tiles perfectly, interior angle (∠D) of the third Octagonal tile should be 132°.

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3 years ago
How to solve 6x>-24 and 9x<54 ?
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To find the length of CE, we have to "solve" the upper triangle.

Here's an outline of what to do:

1.  Show that BC=AD and find the length.
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3.  Note that angle EAD is 30 degrees.  Why?
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Answer:

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Diego has $11 and begins $5 each week toward buying a new phone.

⇒               ......[1]

It is also given that Lin $60 and begins spending $2 per week.

⇒               ....[2]

when they have the same amount.

equate [1] and [2] we get;

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Step-by-step explanation:

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