Question

Tolong ya kak ,bantuannya ,trima kasih

Answer 1

Misal : umur ayah = X , umur adi = y
(x-2)=6(y-2)
x-2 = 6y - 12
x-6y = -12+2
x-6y = -10.......(1)

(x+18) = 2(y+18)
x + 18 = 2y + 36
x-2y = 36-18
x-2y = 18..........(2)

pers 1&2.
x-6y =-10
x-2y= 18
.............. -
-4y = -28
y = 7 th (umur adi)

x-6y = -10
x-6.7 = -10
x-42 = -10
x = -10+42
x = 32 (umur ayah )

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