Vienādojums un tā sakne.

-9 + 7x = 5

- 23x + 6 = 14

- 15 = 2x - 78

- 9 - x = 2x - 7

 $\frac{2x}{3}+\frac{5}{6}=\ \frac{-3x}{4}+\frac{1}{12}$  

 $5y\ =\ 60$  

x - 7 = 17

x + 4 = - 7

 $\frac{d\ -\ 3}{3}=1$  

 $\frac{4y}{7}-\frac{y}{7}=21$