Question

2. Numărul natural n din egalitatea 27 - (n.24+1): 7 = 20 este: a) 5 b) 8 c) 6 d) 2 ,va rog ajutatima repede​

Answer 1

Răspuns:

27 - (n·24+1): 7 = 20

(24n+1):7=27-20

24n+1=7·7

24n=49-1

n=48:24

n=2

Answer 2

Răspuns:  $\red{\bf~ n=2~}$

$\bf 27 - (n\cdot 24+1): 7 = 20$

$\bf 27 =20+ (n\cdot 24+1): 7$

$\bf 27 -20= (n\cdot 24+1): 7$

$\bf 7= (n\cdot 24+1): 7~~~\bigg|\cdot 7$

$\bf 49= n\cdot 24+1$

$\bf 49-1= n\cdot 24$

$\bf 48= n\cdot 24~~~~\bigg|:24$

$\bf 2= n$

$\red{\underline{\bf~ n=2~}}$