Question
Verify by substitution that:
The root of 3 + 2x = 9 is x = 3

Answer

The given equation is 3 + 2x = 9
Substituting x = 3, we get L.H.S. = 3 + 2x
= 3 + 2 × 3
= 3 + 6 = 9
= R.H.S.
It is verified that x = 3 is the root of the given equation.

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