anonymous
  • anonymous
Solve this system of equations: 2x - 5y =1 4x + 2y = 14
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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Hero
  • Hero
2x-5y = 1 4x+2y = 14 y = (1-2x)/-5 y = (14-4x)/2 y = y 2(1-2x) = -5(14-4x) 2 -4x= -70+20x 72 = 24x 72/24 = x x = 3 y = 1
anonymous
  • anonymous
Whay do you multiply it my -5 and 2?
Hero
  • Hero
Because I crossed multiplied by fractions I created once I isolated y

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anonymous
  • anonymous
why do you cross multiply?
Hero
  • Hero
Because I set two fractions equal to one another. I set them equal to each other because they are expressions that represent intersecting lines. The goal is to find the (x,y) point where they intersect. Setting the expressions equal to each other is and finding the (x,y) points is like graphing both lines to find the point, except one is an algebraic method and the other is a graphic method.
anonymous
  • anonymous
oh, thank you. :D

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