1) 0,19x + 1,25x = 1,728
1,44x = 1,728
x = 1,728 : 1,44
x = 1,2
2) 3,45x – 2,05x = 3,15
1,4x = 3,15
x = 3,15 : 1,4
x = 2,25
3) 2,44x – 1,32x + 2,8 = 6,944
1,12x = 6,944 – 2,8
1,12x = 4,144
x = 4,144 : 1,12
x =3,7
4) 1,3x + 5,7x – 2,16 = 15,76
7x = 15,76 + 2,16
7x = 17,92
x = 17,92 : 7
x = 2,56