Answer :
[tex]\frac{5}{n} =\frac{1.5}{1.8} \\ \\ n\neq 0 \\ \\1.5n=5\cdot 1.8\\ \\1.5n= 9 \ \ / : 1.5 \\ \\ n=6[/tex]
5/n = 1.5/1.8
Multiply each side by 'n':
5= 1.5n/1.8
Multiply each side by 1.8 :
9 = 1.5n
Divide each side by 1.5 :
6 = n
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Easier:
5/n = 1.5/1.8
Perform the division on the right side:
5/n = 5/6
Multiply each side by 'n' :
5 = 5n/6
Multiply each side by 6 :
30 = 5n
Divide each side by 5 :
6 = n