Answer:
1. z=140
2. z=130
3. z=145
4. z=180
5. z=155
6. z=120
Step-by-step explanation:
1. z+40=180 so you should subtract 40 from both sides of the equation to get 180-40=140, meaning that z=140
2. 50+z=180 so you should subtract 50 from both sides of the equation to get 180-50=130, meaning that z=130
3. subtract 35 from both sides of the equation to get 180-35=145, meaning that z=145
4. You can just solve this equation as 90+90=180, meaning that z=180
5. subtract 25 from both sides of the equation to get 180-25=155, meaning that z=155
6. subtract 60 from both sides of the equation to get 180-60=120, meaning that z=120
