Question
Solve the following equation by trial and error method:
4x = 28
4x = 28
✓
Answer
The given equation is 4x = 28
We guess and try several values of x to find L.H.S. and R.H.S. and stop when L.H.S. = R.H.S.
When x = 7, we have L.H.S. = R.H.S
So x = 7 is the solution of the given equation.
We guess and try several values of x to find L.H.S. and R.H.S. and stop when L.H.S. = R.H.S.
| x | L.H.S. | R.H.S. |
| 2 | 4 × 2 = 8 | 28 |
| 4 | 4 × 4 = 16 | 28 |
| 5 | 4 × 5 = 20 | 28 |
| 6 | 4 × 6 = 24 | 28 |
| 7 | 4 × 7 = 28 | 28 |
So x = 7 is the solution of the given equation.
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