Question

Q-1 sold solve the equations by trail and
error method:
i) the sum of numbers x
and 4 is 9​

Answer 1

Answer:

5

Explanation:

Substitute x such that x is less than or equal to 9 .

For example,

When x = 1 ,

X+ 4≠9

By doing so We find that x = 5 so that x+4 =9

Answer 2

Answer:

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