Find the solution of following equation from the given ????????

Question

c + 12 = 30; 8, 16, 18.

Answer 1

The replacement set is c={8,16,18}

Replace c in c+12=30  with each value in the replacement set

and check Whether the equation is true.

c	c+12=30	True or False
8	8+12=30→20#30	False
16	16+12=30→28#30	False
18	18+12=30→30=30	True

Since c = 18 makes the equation true, the solution of c+12=30 is 18.

The solution set is {18}.