You can use properties to solve equations with variables on both side by simplifying get the variable on one side. solve using inverse operations then check to see if it fits in right .
Answer:

Step-by-step explanation:
Total amount of water = 500 ml
Mary drank = 400 ml
<u>Left:</u>
= 500 ml - 400 ml
= 100 ml
This was divided equally among 4 friends.
So,
<u>Each friend got:</u>
= 100 ml/4
= 25 ml
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Answer:
The answer is 7
Step-by-step explanation:
Sorry I know it’s wrong I needed points
Answer: 49
Step-by-step explanation: angle BCA is congruent to angle DCA therefore they are the same measure