Question

trial and error method 2x +7=11​

Answer 1

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TRIAL :-

2x + 7 = 11

2x = 11 - 7

2x = 4

x = 4/2

x = 2.

ERROR CHECKING :-

Let Us Put 2 Instead of x,

2(2) + 7 = 11

4 + 7 = 11

11 = 11

● Hence Proved ●.