3х-2,5=х. 3/4у-1=1/2у. 0,7z=0,5z+3

Question

3х-2,5=х.

3/4у-1=1/2у.

0,7z=0,5z+3

Answer 1

3х-2,5=х
2х=2,5
х=1,25

3/4у-1=1/2у
1/4у=1
у=4

0,7z=0,5z+3
0,2z=3
z=15