Решите уравнения х+3х+5=17 3.5х+2.2х=4.56 3.2y-2.7y=0.6 3.7z-z=0.54

1) x+3x+5=17
4x=12
x=3
2)3.5x+2.2x=4.56
5.7x=4.56
x=0.8
3)3.2y-2.7y=0.6
0.5y=0.6
y=1.2
4)3.7z-z=0.54
2.7z=0.54
z=0.2

х + 3х + 5 = 17
4х + 5 = 17
4х = 17 - 5
4х = 12
х = 3
_____________________
3,5х + 2,2х = 4,56
5,7х = 4,56
х = 0,8
______________________
3,2y - 2,7y = 0,6
0,5у = 0,6
у = 1,2
______________________
3,7z - z = 0,54
2,7z = 0,54
z = 0,2