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Blonda9091
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Răspuns :

6/5 = n/15
15 = 3*5 =>n= 6 * 3 .
6*3 = 18;
n=18.
Sabinaalina
a) 6/5=n/15 rezulta 6*15=5*n, n=6*15/5, n=90/5, n=18
b)n=36*3/27, n=4
c) n=35*6/7, n=30
d) n-2= 12*2/8, n-2= 3, n=5
e) (2n+2)*3=2(3n+3), 6n+6=6n+6, n=0
f) 2n²=10*5, n²=25, n=5
g) 3n²=2*24, n²=2*24/36, n²=4/9, n=2/3
h) 2n²=9*50, 2n²=450, n²=225, n=15