m. -4(x + 1) + 89x – 3) = 24 n. 5(x – 30 – 2(x + 6) = 9 o. -3(x – 5) + 6(x + 2) = 9 p. 7(x – 9) – 5(6 – x) = – 6 + 11x q.

0 bình luận về “m. -4(x + 1) + 89x – 3) = 24 n. 5(x – 30 – 2(x + 6) = 9 o. -3(x – 5) + 6(x + 2) = 9 p. 7(x – 9) – 5(6 – x) = – 6 + 11x q.”

1. -4(x + 1) + 8(x – 3) = 24

   => -4x – 4 + 8x – 24 = 24

   => -4x = 24 + 24 + 4

   => -4x = 52

   => x = -13

   5(x – 30 )– 2(x + 6) = 9

   => 5x – 150 – 2x – 12 = 9

   => 3x – 162 = 9

   => 3x = 9 + 162

   => 3x = 171

   => x = 57 

   -3(x – 5) + 6(x + 2) = 9

   => -3x + 15 + 6x + 12 = 9 

   => 3x + 27 = 9

   => 3x = 9 – 27 

   => 3x = -18 

   => x = -6

   7(x – 9) – 5(6 – x) = – 6 + 11x

   => 7x – 63 – 30 + 5x = -6 + 11x 

   => 7x + 5x – 11x – 87 = 0

   => x – 87 = 0

   => x = 87

   10(x – 7) – 8(x + 5) = 6.(-5) + 24

   => 10x – 70 – 8x -40 = -30 + 24

   => 2x – 110 = -6

   => 2x = -6 + 110

   => 2x = 104

   => x = 52

    

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2. -4(x + 1) + 8(x – 3) = 24

   => -4x – 4 + 8x – 24 = 24

   => -4x = 24 + 24 + 4

   => -4x = 52

   => x = -13

   5(x – 30 )– 2(x + 6) = 9

   => 5x – 150 – 2x – 12 = 9

   => 3x – 162 = 9

   => 3x = 9 + 162

   => 3x = 171

   => x = 57 

   -3(x – 5) + 6(x + 2) = 9

   => -3x + 15 + 6x + 12 = 9 

   => 3x + 27 = 9

   => 3x = 9 – 27 

   => 3x = -18 

   => x = -6

   7(x – 9) – 5(6 – x) = – 6 + 11x

   => 7x – 63 – 30 + 5x = -6 + 11x 

   => 7x + 5x – 11x – 87 = 0

   => x – 87 = 0

   => x = 87

   10(x – 7) – 8(x + 5) = 6.(-5) + 24

   => 10x – 70 – 8x -40 = -30 + 24

   => 2x – 110 = -6

   => 2x = -6 + 110

   => 2x = 104

   => x = 52

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