х+8=16Х-16
0,3(Х-7)+0,6=0,6(3+Х)

18х + 8 = 16х - 16,

18х - 16х = -16 - 8,

2х = -24

х = -12

ответ: -12

0.3(Х - 7) + 0.6 = 0.6(3 + Х),

0.3х - 2.1 + 0.6 = 1.8 + 0.6х,

0.3х - 0.6х = 1.8 - 0.6 + 2.1,

-0.3х = 3.3,

х = -11.

ответ: -11