Vă rog să mă ajuți! dau coroană, va rog mult|9;10;11;12;13.....

[tex]9) \frac{3}{9} + x = \frac{8}{9} [/tex]

[tex]x = \frac{8}{9} - \frac{3}{9} [/tex]

[tex]x = \frac{8 - 3}{9} [/tex]

[tex]x = \frac{5}{9} [/tex]

[tex]10)x - \frac{1}{5} = \frac{3}{5} [/tex]

[tex]x = \frac{3}{5} + \frac{1}{5} [/tex]

[tex]x = \frac{3 + 1}{5} [/tex]

[tex]x = \frac{4}{5} [/tex]

[tex]11) \frac{7}{8} - x = \frac{3}{8} [/tex]

[tex]x = \frac{7}{8} - \frac{3}{8} [/tex]

[tex]x = \frac{7 - 3}{8} [/tex]

[tex]x = \frac{4}{8} [/tex]

[tex]x = \frac{1}{2} [/tex]

[tex]12) \frac{7}{7} - ( \frac{2}{7} + \frac{3}{7} ) [/tex]

[tex] = \frac{7}{7} - \frac{2 + 3}{7} [/tex]

[tex] = \frac{7}{7} - \frac{5}{7} [/tex]

[tex] = \frac{7 - 5}{7} [/tex]

[tex] = \frac{2}{7} [/tex]

[tex]13)( \frac{5}{6} - \frac{2}{6} ) + \frac{1}{6} + \frac{2}{6} [/tex]

[tex] = \frac{5 - 2}{6} + \frac{1 + 2}{6} [/tex]

[tex] = \frac{3}{6} + \frac{3}{6} [/tex]

[tex] = \frac{3 + 3}{6} [/tex]

[tex] = \frac{6}{6} [/tex]

[tex] = 1[/tex]

9. a+b=8/9

3/9 + b = 8/9

b= 8/9 - 3/9

b= 5/9

10.  x-1/5 = 3/5

x = 3/5+1/5

x=4/5

11.   7/8-x = 3/8

x = 7/8-3/8

x = 4/8=2/4=2/2 ( simplifici de fiecare data cu 2 daca ai invatat simplificarea deca nu e 4/8

12.  7/7 - (2/7 + 3/7) = 7/7 - 5/7=2/7

13.  (5/6-2/6) +( 1/6+2/6) = 3/6 + 3/6=6/6=1