Let's first solve the equation:
(120 + 80) - z = 50200 - z = 50-z = 50 - 200-z = -150z = 150
Now let's solve the second equation:
60 - (30 + 15)60 - 45 = 15
Therefore, z = 150 and the second equation equals 15.
Let's first solve the equation:
(120 + 80) - z = 50
200 - z = 50
-z = 50 - 200
-z = -150
z = 150
Now let's solve the second equation:
60 - (30 + 15)
60 - 45 = 15
Therefore, z = 150 and the second equation equals 15.