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15+196
211
maaf kalo slah
U5= a+4b= 31
Dit: U50= ?
Peny:
Sistem eliminasi:
a+4b=31
a+b=19
dikurangi....
3b=12
b=4
Subtitusi:
a+4=19
a=15
U50= a+49b
= 15+49.4
= 211