2x + 3y = 60x + 2y = 20 nilai x dan y ? …hmmm, apalagi ya… :/​

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2x + 3y = 60x + 2y = 20 nilai x dan y ? …hmmm, apalagi ya… :/​

2x + 3y = 60 … (1)

x + 2y = 20 … (2)

  • Nilai x

2x + 3y = 60

2x + 4y = 40

_____________-

-y = 20

y = -20

  • Nilai x

x + 2y = 20

x + 2(-20) = 20

x + (-40) = 20

x = 20 + 40

x = 60

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Penjelasan dengan langkah-langkah:

2x + 3y = 60 (×1)

x + 2y = 20 (×2)

  • 2x + 3y = 60
  • 2x + 4y = 40 –

————————-

-1y = 20

y = -20

2x + 3y = 60

2x + 3(-20) = 60

2x + (-60) = 60

2x = 60 – (-60)

2x = 120

x = 60

HP = {x, y} = {60, –20}