akybrown akybrown
  • 23-08-2017
  • Mathematics
contestada

Use substitution to solve the system.

y =2x - 4
5x+2y =1

x=
y=

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choixongdong
choixongdong choixongdong
  • 23-08-2017
y =2x - 4
5x+2y =1

substitute y =2x - 4 into 5x+2y =1
5x+2y =1
5x+2(2x - 4) =1
5x + 4x - 8 = 1
9x = 9
x = 1
y =2x - 4 = 2(1) - 4 = -2

answer
x = 1 and y = -2
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