jaydakelly73 jaydakelly73
  • 23-08-2018
  • Mathematics
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solve 3x-5y=13 4x+8y=-9

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Аноним Аноним
  • 23-08-2018

multiply the first equation by 4 and the second by -3, we get

12x - 20y = 52

-12x - 24y = 27

Add these 2 equations to eliminate x:-

-44y = 79

y = 79 / -44 = -1.795

Substitute for y in the original equation:-

3x - 5(-1.795) = 13

3x = 4.025

x = 1.342

Solution is (-1.80, 1.34) to nearest hundredth

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