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soldier1979 [14.2K]
1 year ago
13

-8y-(4x-3)-y+9x distribute and combine

Mathematics
1 answer:
NNADVOKAT [17]1 year ago
7 0

Answer:

-9y + 5x + 3

Step-by-step explanation:

-8y - (4x - 3) - y + 9x:

Group like terms = -(4x - 3) -8y - y + 9x

Add similar Elements - 8y - y + 9x = - (4x - 3) - 9y + 9x

Apply the distributive law: - (a - b) = -a + b = - (4x -3) = -4x + 3

= 4x + 3 - 9y + 9x

Group like terms = -9y - 4x + 9x + 3

Add similar Elements -4x + 9x = 5x

= -9y + 5x + 3

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3 years ago
100 POINTS solve the system using linear combination. show all work.{ 5x + 3y = 41 {3x - 6y = 9
PIT_PIT [208]

Answer:

y = 2

x = 7

Explanation:

  • 5x + 3y = 41
  • 3x - 6y = 9

<u>Make the coefficient of "y" in equation 1 same</u>

{ 5x + 3y = 41 } * 2     →  10x + 6y = 82  ........equation 1

                                  →  3x - 6y = 9 ........equation 2

<u>solving them using linear combination</u>

  • 10x + 6y = 82
  • 3x - 6y = 9

     ============

  • 13x = 91
  • x = 7

Find y:

  • 5x + 3y = 41
  • 5(7) + 3y = 41
  • 3y = 41 - 35
  • 3y = 6
  • y = 2
4 0
2 years ago
Read 2 more answers
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