Question
Solve the following equations by trial and error method:
x - 7 = 10

Answer

x - 7 = 10
Here, L.H.S. = x - 7 and R.H.S. = 10.
x
L.H.S.
R.H.S.
Is L.H.S. = R.H.S.
9
9 - 7 = 2
10
No
10
10 - 7 = 3
10
No
11
11 - 7 = 4
10
No
12
12 - 7 = 5
10
No
13
13 - 7 = 6
10
No
14
14 - 7 = 7
10
No
15
15 - 7 = 8
10
No
16
16 - 7 = 9
10
No
17
17 - 7 = 10
10
Yes
Therefore, if x = 17, L.H.S. = R.H.S.
Hence, x = 17 is the solution to this equation.

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