Question

Complete the table and find the solution to the equation m − 7 = 3.

m	5	6	7	8	9	10	11	12	13	______
m − 7	______	______	______	______	______	______	______	______	______	______

Answer 1

For m − 7, the table can be constructed as follows. 

m	m − 7
5	5 − 7 = − 2
6	6 − 7 = − 1
7	7 − 7 = 0
8	8 − 7 = 1
9	9 − 7 = 2
10	10 − 7 = 3
11	11 − 7 = 4
12	12 − 7 = 5
13	13 − 7 = 6

By inspection, we can find that m = 10 is the solution of the above equation as for m = 10, m − 7 = 10 − 7 = 3