Solve the following by the trial and error method 5 a minus 12 is equal to 23
Answers
Answer:
a = 7 is solution.
Step-by-step explanation:
Putting a = 0
5a - 12 = 23
5(0) - 12 = 23
0 - 12 = 23
-12 = 23
It is not true.
Therefore, a = 0 is not a solution.
Putting a = 1
5a - 12 = 23
5(1) - 12 = 23
5 - 12 = 23
-7 = 23
It is not true.
Therefore, a = 1 is not a solution.
Putting a = 2
5a - 12 = 23
5(2) - 12 = 23
10 - 12 = 23
-2 = 23
It is not true.
Therefore, a = 2 is not a solution.
Putting a = 3
5a - 12 = 23
5(3) - 12 = 23
15 - 12 = 23
3 = 23
It is not true.
Therefore, a = 3 is not a solution.
Putting a = 4
5a - 12 = 23
5(4) - 12 = 23
20 - 12 = 23
8 = 23
It is not true.
Therefore, a = 4 is not a solution.
Putting a = 5
5a - 12 = 23
5(5) - 12 = 23
25 - 12 = 23
13 = 23
It is not true.
Therefore, a = 5 is not a solution.
Putting a = 6
5a - 12 = 23
5(6) - 12 = 23
30 - 12 = 23
18 = 23
It is not true.
Therefore, a = 6 is not a solution.
Putting a = 7
5a - 12 = 23
5(7) - 12 = 23
35 - 12 = 23
23 = 23
It is true.
Therefore, a = 7 is a solution.