1) 168 - (98 + z) = 6168 - 98 - z = 670 - z = 6-z = 65 - 7-z = -z = 5
2) (s + 275) - 275 = 38s + 275 - 275 = 38s = 384
1) 168 - (98 + z) = 6
168 - 98 - z = 6
70 - z = 6
-z = 65 - 7
-z = -
z = 5
2) (s + 275) - 275 = 38
s + 275 - 275 = 38
s = 384