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Natali5045456 [20]
3 years ago
7

-3(-2x+1)-x=3(-x+2)-1

Mathematics
2 answers:
olga55 [171]3 years ago
8 0

Answer: I think it is 5 or 4

hram777 [196]3 years ago
7 0
1 Regroup terms.
−
3
(
−
2
x
+
1
)
−
x
=
3
(
2
−
x
)
−
1
−3(−2x+1)−x=3(2−x)−1

2 Expand.
6
x
−
3
−
x
=
6
−
3
x
−
1
6x−3−x=6−3x−1

3 Simplify
6
x
−
3
−
x
6x−3−x to
5
x
−
3
5x−3.
5
x
−
3
=
6
−
3
x
−
1
5x−3=6−3x−1

4 Simplify
6
−
3
x
−
1
6−3x−1 to
−
3
x
+
5
−3x+5.
5
x
−
3
=
−
3
x
+
5
5x−3=−3x+5

5 Add
3
3 to both sides.
5
x
=
−
3
x
+
5
+
3
5x=−3x+5+3

6 Simplify
−
3
x
+
5
+
3
−3x+5+3 to
−
3
x
+
8
−3x+8.
5
x
=
−
3
x
+
8
5x=−3x+8

7 Add
3
x
3x to both sides.
5
x
+
3
x
=
8
5x+3x=8

8 Simplify
5
x
+
3
x
5x+3x to
8
x
8x.
8
x
=
8
8x=8

9 Divide both sides by
8
8.
x
=
1
ANSWER ~x=1
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Answer:

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Step-by-step explanation:

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STatiana [176]

Answer:

The length of the first piece = 41 cm

Step-by-step explanation:

Let the length of the first piece = a

Let the length of the second piece = b

Let the length of the third piece = c

we are given the following:

b = 3a . . . . . (1)     (The 2nd piece is 3 times as long as the 1st piece)

c = 6 + a  . . . . (2)    (the 3rd piece is 6 centimeters longer than the 1st piece)

a + b + c = 211 . . . . . (3)    (  the yarn has a total length of 211 centimeters)

Next, let us eliminate two variables, and this can easily be done by substituting the values of b and c in equations 1 and 2 into equation 3. this is done as follows:

a + b + c = 211

a + (3a) + (6 + a) = 211       ( remember that   b = 3a; c = 6 + a)

a + 3a + 6 + a = 211

5a + 6 = 211

5a = 211 - 6 = 205

5a = 205

∴ a = 205 ÷ 5 = 41 cm

a = 41 cm

Therefore the length of the first piece (a) = 41 cm

now  finding b and c

substituting a into equation 1 and 2

b = 3a

b = 3 × 41 = 123

∴ b = 123 cm

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∴ c = 47 cm

6 0
3 years ago
How do you do this? I'll give brainliest, please help.
Dmitriy789 [7]

Answer:

Domain is all values of X or (-∞,∞)

Range is all the possible values of Y. Since it goes up to 3, and then it goes down, it's all values less than or equal to y, or (-∞,3] or y ≤ 3 (depending on how you need to enter the response.

Step-by-step explanation:

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Vlad1618 [11]

Answer:

120 cm squared

Step-by-step explanation:

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7 0
3 years ago
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