Sagot :
Selam
- Sayı = a
- 7a+21 = 210
- 7a=210-21
- 7a= 189
- a=27
Cevap 27 olur.
Tuana ♡ Sabri ∞
Cevap:
27
Adım adım açıklama:
Bir sayi: x
bu sayinn yedi kati: 7x
..ve 21 fazlasi: 7x + 21
esittir: 210, yani
7x + 21 = 210 |-21
7x = 189 |: 7
x = 27
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