помогите уравнения решить 6 класс

0.7 х+5 (5 х-1) = 6.5+2.7 х

0.3 (0.4 х-1.2) + 0.36 х=3

0.6 (х-0.6) + 0.8 (х-0.4) = 1

1) 0.7 х+25 х-5=6.5+2.7 х

0.7x+25x-2.7x=6.5+5

23x=11.5

x=0.5

2) 0.12x-0.36+0.36x=3

0.48x=3.36

x=7

3) 0.6x-0.36+0.8x-0.32=1

1.4x=1.68

x=1.2

0.7 х+5 (5 х-1) = 6.5+2.7 х

0.7 х+25 х-5=6.5+2.7 х

0.7 х+25 х-2.7 х=6.5+5

23 х=7

х=3.2

0.3 (0.4 х-1.2) + 0.36 х=3

0.12 х-0.36+0.36 х=3

0.48 х=3+0.36

0.48 х=3.36

х=7

0.6 (х-0.6) + 0.8 (х-0.4) = 1

0.6 х-0.36+0.8 х-0.32=1

0.14 х=1+0.32+0.36

0.14 х=1.68

х=12