Subtract.

(

3x+7)–(7x–4)

To subtract the expressions, we will distribute the negative sign to each term in the second expression:

(-) * (7x) = -7x
(-) * (-4) = 4

Now we can rewrite the expression:

(-3x + 7) - (7x - 4) = -3x + 7 - 7x + 4

Next, we can combine like terms:

-3x - 7x + 7 + 4 = -10x + 11

Therefore, the simplified expression is -10x + 11.