25-4y=6y+15
pindah ruas y-y
-6y-4y=15-25
-10y=10 (sama sama dkali (min) -)
10y=10 masing masing dibagi 10
hasilnya y=1
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25-4y=6y+15
pindah ruas y-y
-6y-4y=15-25
-10y=10 (sama sama dkali (min) -)
10y=10 masing masing dibagi 10
hasilnya y=1
25 -4y + 4y = 6y + 4y + 15
25 = 10y + 15
25-15 = 10y + 15-15
10 = 10y
1/10 x 10y = 1/10 x 10
y = 1
HP = {y} = {1}