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# 1. 3x = 2x + 18

Given, 3x = 2x + 18
$$\Rightarrow$$ 3x – 2x = 18 (Transposing 2x to LHS)

$$\Rightarrow$$x = 18

Hence, x = 18 is the required solution.

Checking:

3x = 2x + 18

Substitute x = 18 in the given equation, we have

LHS = 3 × 18 = 54

RHS = 2 × 18 + 18 = 36 + 18 = 54

LHS = RHS

Hence x=18 is the required solution.