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We conclude that the 12x is the required expression that is equivalent to 7x + 4x + x and has only one term.

Step-by-step explanation:

Given the expression

The current expression has three terms such as 7x, 4x, and x.

The current expression can be further simplified such as

Add similar elements:  

Thus, the given expression can be expressed as the only one term such as .

i.e.

Therefore, we conclude that the 12x is the required expression that is equivalent to 7x + 4x + x and has only one term.

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109 is the nearest whole number/final answer! : )