Respuesta :

The given algebraic expression is

[tex](12x-2.1)-(19x+6.9)[/tex]

To simplify this expression, we need to solve those parentheses in the first place, multiplying the sign in front of each of them.

[tex]12x-2.1-19x-6.9[/tex]

Now, we reduce like terms. Remember that like terms are those who have the same variable, and those who don't have variables at all.

[tex]12x-19x-2.1-6.9=-7x-9[/tex]

Therefore, the simplest form of the given expression is

[tex]-7x-9[/tex]

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