fgdgsfw fgdgsfw
  • 24-10-2020
  • Mathematics
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у = 3х – 8
(6х + Зу = -9

у 3х 8 6х Зу 9 class=

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delancygenius
delancygenius delancygenius
  • 24-10-2020

y = 3x - 8 ---- i

6x + 3y = -9

=>6x +3 (3x-8) = -9 (substituting y= 3x-8)

=> 6x + 9x - 24 = -9

=> 15x = 24 -9

=> 15x = 15

=> [tex]\red{\bold{\large{ x= 1}}}[/tex]

Now substituting x = 1 in equation i,

y = 3 × 1 -8

=> y = 3 -8

=> [tex]\red{\bold{\large{ y= -5}}}[/tex]

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