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misal dewasa= x, anak2=y.
jd model mtk nya:
x+y= 498
5000x+3000y= 2000.000
x+y= 498
5x+3y= 2000
pers 1 d kalikan 5
5x+5y= 2490
5x+3y= 2000
pers 1 d kurangi pers 2:
2y= 490
y= 245
jd bnyk pengunjung ank2= 245 ank
x + y = 498 .. pers 1
5000x + 3000y = 2.000.000 --> sederhanakan
5x + 3y = 2000 ... pers 2
eleminasi:
x + y = 498 (x5) --> 5x + 5y = 2490
5x + 3y = 2000 (x1) --> 5x + 3y = 2000 _
2y = 490
y = 245
jadi banyak pengunjung anak2 adlh 245 anak (B)
semoga membantu ya :)