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bilngan 1 = n
bilangan 2 = y
maka pertidksamaan :
n-y = 5
y = n-5
n+y = 26
subtitusi nilai y menjadi :
n+y = 26
n + n-5 = 26
2n - 5 = 26
2n = 26+5
n = 31/2
n = 15 1/2
n = 15,5
n+(n-5)=26
n+n-5=26
2n-5=26
2n=31
n=15,5