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caranya yang tinggal di kurangin aja 10.00-7500=2500
7500 dihiyung dari harga 3 pensil jadi haga 1 pensil=rp=2500
2.
harga b + p = 10.000
berapa harga p ?
3p + p = 10.000
4p = 10.000
p : 2500
nilai pensil 2500
2. PQR sudut segitiga
P = 30 - 4r
ditanya besar sudut
180 = 30 - 4r
150 = 4r
r = 37.5