Question

9, rapid, va rog muuult, am nevoie de el acum, dau 20 de puncte pentru rezolvare completă ​

Answer 1

a) n/12=5/6---->n=12·5:6=10

b) 35/n=5/6---->n=35·6:5=42

c)n+1/18=5/6---->n=18·5:6-1

n=29

d) 30/2n+4=5/6--->2n+4=30·6:5

2n+4=36

n=(36-4):2

n=16

e) 105/10n+6=5/6----->10n+6=105·6:5

10n+6=126

n=(126-6):10

n=12

f)55/n+2=5/6--->n+2=55·6:5

n+2=66

n=66-2=64

g) 50/n-14=5/6--->n-14=50·6:5

n-14=60

n=74

h) 15/n+7=5/6--->n+7=15·6:5

n+7=30

n=23

i) n-23/18=5/6--->n-23=18·5:6

n-23=30

n=53

j) 25/n·(n+1)=5/6--->n(n+1)=25·6:5

n(n+1)=30

Sper ca te-am ajutat! :))