Решите уравнение: х+3х+5=17 3,5х+2.2х=4.56 3.2у-2,7у =0.6 3.7z-z=0.54 нужно

3x+5=17
3x=17-5
3x=12
x=12÷3
x=4.

3.5x+2.2x=4.56
5.7x=4.56
x=4.56÷5.7
x=456÷570
x=456/570
x=228/285

3.2y-2.7y=0.6
0.5y=0.6
y=0.6÷0.5
y=6÷5
y=6/5
y=1 1/5

3.7z-z=0.54
2.7z=0.54
z=0.54÷2.7
z=54÷270
z=54/270
z=27/135