2.4х-1.2612-13=1.3х-0.5110-19

2.4X - 1.26 / 1.2 - 1/3 = 1.3X - 0.5 / 1/10 - 1/9 =

1) -1.26 / 1.2 = 1.05

2) -1.05 - 1/3 =  -2.15 / 3

3) 0.5 : 1/10 = 5

4) 5 - 1/9 = 44/9

5) 2,4X - 1.3X = 44/9 + 2.15 / 3

6) 1.1X = 5.6

X = 5.6 : 1.1

X = 5

2.4x-1.26\1\2-1\3=1.3x-0.5\1\10-1\9
2.4x -1.3x=0.5\10-1\9+1.26\1\2-1\3
1.1x=1\2-1\9+1.26\2-1\3
1.1x= 0.5-1/9+0.63-1/3
1.1x=1.13-(1/9+1/3)
1.1x=1.13-(3/9+1/9)
1.1x=1.13-4/9
1.1x=113/10-4/9 

Дорешаешь?