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0=5x+9-8y+6
5x-8y+15=0
2. x+5=10
x=10-5
x=5 atau x-5=0
3. 3y+1=y+7
3y-y=7-1
2y=6
y=3 atau y-3=0
8y - 5x = 15
2) x = 10 - 5
x = 5
3) 3y - y = 7 - 1
2y = 6
y = 6/2
y = 3