-13x= 260

(a)  

1/4 x = 2/5

(a)  

2.5x= -50

(a)  

-120x= -240

(a)  

5x= -40-50

(a)  

1/7x= 0.2

(a)  

-1/2 x= -3/2

(a)  

0.5x = 1/3

(a)  

13x = -200+5

(a)