Question

numărul natural n din egalitatea 27- (n×24+1)÷7=20 este:
a)5
b)8
c)6
d2)
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Answer 1

27-(n×24+1):7=20

(n×24+1):7=27-20

(n×24+1):7=7/×

(n×24+1)=49

n×24=49-1

n×24=48

n=48:24

n=2

Raspuns : d). 2

Answer 2

27 - ( n × 24 + 1 ) : 7 = 20

( n × 24 + 1 ) : 7 = 27 - 20

( n × 24 + 1 ) : 7 = 7

n × 24 + 1 = 7 × 7

n × 24 + 1 = 49

n × 24 = 49 - 1

n × 24 = 48

n = 48 : 24

n = 2