jacque89 jacque89
  • 09-02-2018
  • Mathematics
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What are the coordinates (x, y) at which the graphs of 2x + 3y = 12 and 2x - y = 4 intersect?

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choixongdong
choixongdong choixongdong
  • 09-02-2018
2x + 3y = 12
2x - y = 4 so y = 2x - 4

substitute y = 2x - 4 into 2x + 3y = 12

2x + 3y = 12
2x + 3(2x - 4)= 12
2x + 6x - 12 = 12
8x = 24
x = 3
y = 2x - 4 = 2(3) - 4 = 2

(3,2)

answer
the coordinates (3,2)
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