1) 16,4-5,4*x=14,78

2) 10,2*x-7,4*x+0,88=2

3) 0,6*y+0,18*y-2,376=5,58

1) 16,4-5,4*x=14,78

-5,4x=14,78-16,4

-5,4x = - 1,62

x = 0,3

2) 10,2*x-7,4*x+0,88=2

10,2x-7,4x=2-0,88

2,8x = 1,12

x = 0,4

3) 0,6*y+0,18*y-2,376=5,58

0,6y+0,18y=5,58+2,376

0,78y = 7,956

y = 10,2