(x+26)-29=19 67-z=28
y+56=83

1) (x+26)-29=19;

x+26 = 19+29;

x = 48-26;

x = 22;

2) 67-z=28

z = 67-28;

z = 39;

 3) y+56=83

y = 83 - 56;

y = 27;