Răspuns:
a)
[tex]\frac{x}{15}[/tex] = [tex]\frac{3}{5}[/tex]
5 * x = 15 * 3
5x=45
x=45/5
x=9
b)
[tex]\frac{18}{12}[/tex] = [tex]\frac{2x+1}{10}[/tex]
18 * 10 = 12 * ( 2x+1 )
180 = 24x+12
24x=168
x=168/24
x=7
c)
[tex]\frac{x+1}{16}[/tex] = [tex]\frac{5}{8}[/tex]
8 * ( x+1 ) = 16 * 5
8x+8=80
8x = 72
x=9
d)
[tex]\frac{3}{2}[/tex] = [tex]\frac{2x+1}{6}[/tex]
3 * 6 = 2 * ( 2x+1 )
18 = 4x + 2
4x = 16
x = 4
e)
[tex]\frac{12}{x+2}[/tex] = [tex]\frac{9}{6}[/tex]
12 * 6 = ( x+2 ) * 9
72 = 9x + 18
9x = 54
x = 6
Sper ca ai inteles! :D
