Question

3.5х+2.2х=4.56 3.7z-z=0.54

Answer 1

3.5х+2.2х=4.56
5.7х=4.56
х=4.56:5.7
х=0.8
3.7z-z=0.54
2.7z=0.54
z=0.54:2.7
z=0.2