23+х=54 43-у=26 Z-28=31 C+48=79

Question

23+х=54 43-у=26 Z-28=31 C+48=79

Answer 1

1)23+х=54
х=54-23
х=31
2)43-у=26
43-26=у
у=17
3)z-28=31
z=31+28
z=59
4)c+48=79
c=79-48
c=31