100 Things Capitals Fans Should Know & Do Before They Die (100 Things...Fans Should Know)

100 Things Capitals Fans Should Know & Do Before They Die (100 Things...Fans Should Know)

Matematika Jika (x-y)x15=720 Dan (x+y)x10=720 Tentukanlah nilai x dan y

Jika (x-y)x15=720 Dan (x+y)x10=720 Tentukanlah nilai x dan y

Jawab:  x =60 dan y=12

Penjelasan dengan langkah-langkah:

(x-y)x15=720

15x - 15 y =720

(x+y)x10=720

10x + 10y =720

Eliminasi

10x + 10y =720  (x15)

15x - 15 y =720  (x10)

150x+150y = 10800

150x-150y =    7200   -

         300 y = 3600

y = 3600/300 = 12

10x + 10y =720

10x + 10(12) =720

10x = 720-120

10x =600

x = 600/10 = 60

Jadi :  x =60 dan y=12

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