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Anestetic [448]
3 years ago
15

Point

Mathematics
2 answers:
inn [45]3 years ago
8 0

Hey there! :)

Answer:

A. x = 5.

Step-by-step explanation:

Starting with:

4x + 1 = 21

Subtract 1 from both sides:

4x + 1 - 1 = 21 - 1

4x = 20

Divide both sides by 4:

4x/4 = 20/4

x = 5.

OlgaM077 [116]3 years ago
7 0

Answer:

A.X=5

Step-by-step explanation:

4x+1=21

    -1=-1

4x=20

4x/20 = 5

or just plug in five for x and you get 21

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4 0
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Solve using substitution<br> y=3x-5<br> 2x+5y=-42
Paul [167]

Answer:

Solution point is (-1,-9)

Step-by-step explanation:

Put the value of y in the first equation into the second equation.

  • 2x + 5(3x - 5) = - 42            Remove the brackets on the left
  • 2x + 15x - 25 = - 42            Combine like terms on the left
  • 17x - 25 = - 42                     Add 25 to both sides
  • 17x - 25 + 25 = - 42 + 25    Do the addition
  • 17x = - 17                              Divide by 17
  • 17x/17 = -17/17                      Do the division
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=======

Solve for y

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  • y = -3 - 6
  • y = - 9
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