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25 x (2x+1) ≤ 425
50x+25 ≤ 425 ...... persamaan
50x ≤ 425-25
x ≤ 400/50
x ≤ 8
pajang dan lebar
panjang 25 m
lebar= 2x+1=2(8)+1=16+1=17 m
lebar==2x+1
luas=>425
L=PXL
a. P X L > 425
25(2x+1) > 425
50x+25 > 425
50x > 425-25
50x > 400
x > 8