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pelurus 125=55
180-94+55= 31
plurus 31=x=149
5 4x-12+48=180
4x+36 = 180
4x = 180-36
= 144
x = 144/4
= 36
6 2y+5+x = 180
2y+x = 180-5
= 175
2*50+75=175
jadi isinya 50