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4y + 6y < 8 + 2 + 20
10 y < 30
y < 30 : 10
y < 3
saya hanya tau segitu
10y < 30
y < 3
2.2/3y+1/3 < 5/3y-1/3
1/3+1/3 < 5/3y-2/3y
2/3 < 3/3y
y > 2/3
semoga membantu:)