Question
Solve the following equation by trial and error method: $y + 9 = 13$
✓
Answer
The given equation is $y + 9 = 13$ We try several values of $y$ and find $L.H.S$. and the $R.H.S$. and stop when $L.H.S. = R.H.S.$
When $y = 4$, we have $L.H.S. = R.H.S.$ So $y = 4$ is the solution of the given equation.
| y | L.H.S. | R.H.S. |
| $2$ | $2 + 9 = 11$ | $13$ |
| $3$ | $3 + 9 = 12$ | $13$ |
| $4$ | $4 + 9 = 13$ | $13$ |
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