salma put 4 red candles and three yellow candles in her father's birthday cake if the red candle stands for a year and the yellow candle stands for 10 years calculate the age of salma's father
if you know that on the next birthday of samia's mother, she will be 31 years old, many red candles should be put on the birthday cake then ?
complet/ ............ red candles and ............... yellow candles should be put on the cake >
because : ..............+..............= ..................
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