Answer :
m is a whole number less than 5 Whole numbers less than 5 are 0, 1, 2, 3 and 4 hence m can take values 0, 1, 2, 3 and 4
When m = 0:
2m – 5 = 2 × 0 – 5 = -5
When m = 1:
2m – 5 = 2 × 1 – 5 = 2 – 5 = -3
When m = 2:
2m – 5 = 2 × 2 – 5 = 4 – 5 = -1
When m = 3:
2m – 5 = 2 × 3 – 5 = 6 – 5 = 1
When m = 4:
2m – 5 = 2 × 4 – 5 = 8 – 5 = 3
The table becomes
By looking at table the equation 2m – 5 = – 1 holds true when m = 2 hence solution of equation 2m – 5 = – 1 is m = 2
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