Question
Solve the following equations by trial and error method:
4x = 28
4x = 28
✓
Answer
4x = 28 Here, L.H.S. = 4x and R.H.S. = 28
Therefore, if x = 7, L.H.S. = R.H.S.
Hence, x = 7 is the solution to this equation.
|
x
|
L.H.S.
|
R.H.S.
|
Is L.H.S. = R.H.S.
|
|
1
|
4 × 1 = 4
|
28
|
No
|
|
2
|
4 × 2 = 8
|
28
|
No
|
|
3
|
4 × 3 = 12
|
28
|
No
|
|
4
|
4 × 4 = 16
|
28
|
No
|
|
5
|
4 × 5 = 20
|
28
|
No
|
|
6
|
4 × 6 = 24
|
28
|
No
|
|
7
|
4 × 7 = 28
|
28
|
Yes
|
Hence, x = 7 is the solution to this equation.
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