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9
= 5 x 594
9
= 330⁰C
2) Qlepas = Qterima
m (ta - takhir) = m (takhir - tb)
1 (70 - takhir) = 4 (takhir - 20)
70 - 1 takhir = 4 takhir - 80
70 + 80 = 1 takhir + 4 takhir
150 = 5 takhir
takhir = 150
5
takhir = 30⁰C