Answer:
4
Step-by-step explanation:
Answer:
15
Step-by-step explanation:
10 is 5 less than fifteen.
Sorry if its wrong
Step-by-step explanation:
Given

Hope it will help :)
Answer:
D
Step-by-step explanation:
Answer:
The answer is no solution.
Step-by-step explanation: First, you would add + 12 to both sides of the equation so that you would have 5c + 21 = 5c. Then, you would subtract 5c from both sides of the equation. This would leave you with 21 = 0. Since this is not true, the equation would have no solution.