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a fost răspuns

Aflati x apartine N astfel incat:
a) (x+3)+2(x-1)=25
b)37-2(x+3)=21
c) [(x-2)×3+5]:2=13
d) [32-(x-3)×5]×3=21
e) 5(x-1)=4

Răspuns :

EmogirlSenpai
a. x+3+2x-2=25
3x+1=25
3x=24
x=8

b. 37-2x-6=21
31-2x=21
-2x=-10
x=5

c. (3x-6+5):2=13
3x-1=26
3x=27
x=9

d. (32-5x+15)*3=21
47-5x=7
-5x=-40
x=8

e. 5x-5=4
5x=9
x=9/5
nu exista x apartine lui N