Solve the given equation by trial and error method:
2x + 5 = 13

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Solution

The correct option is A 4
The given equation is: 2x + 5 = 13

If x = 1, 2x + 5 = 2 $\times$ 1 + 5 = 7 $\neq$ 13. => LHS $\neq$ RHS
If x = 2, 2x + 5 = 2 $\times$ 2 + 5 = 9
=> LHS $\neq$ RHS
If x = 3, 2x + 5 = 2 $\times$ 3 + 5 = 11 $\neq$ 13
=> LHS $\neq$ RHS

If x = 4, 2x + 5 = 2 $\times$ 4 + 5 = 13.
(LHS = RHS)
Therefore, x = 4 is the solution for the given equation.

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