Question

Determinați numărul natural n din următoarele proporții:

a. 1,2/7n = 0,6/3,5
b. 6n/2,5 = 8/0,(6)
c. 3,6/4,5 = 2n/7,5
d. 0,3/2,4 = 1,5/3n

Answer 1

Răspuns:

$a.1,2*3,5=7n*0,6\\\\4,2=4,2n= > n=4,2:4,2= > n=1\\\\b.0,(6)=\frac{6}{9} =\frac{2}{3} \\\\6n*\frac{2}{3} =2,5*8\\\\\frac{12n}{3} =20= > 12n=20*3= > n=60:12= > n=5\\\\c.2n*4,5=3,6*7,5\\\\9n=27= > n=27:9= > n=3\\\\d.3n*0,3=2,4*1,5\\\\0,9n=3,6= > n=3,6:0,9= > n=4$