Question

Which expression is not equivalent to 3x - 2? (1 point)
4х - 4 - x + 2
x +x -1 -1+x
3 - x + 2x - 5 + 2x
2x + 2 + x

Answer 1

Let's simplify each expression to determine which one is not equivalent to \(3x - 2\).

1. **Expression**: \(4x - 4 - x + 2\)
\[
= (4x - x) + (-4 + 2) = 3x - 2
\]

2. **Expression**: \(x + x - 1 - 1 + x\)
\[
= (x + x + x) + (-1 - 1) = 3x - 2
\]

3. **Expression**: \(3 - x + 2x - 5 + 2x\)
\[
= (-x + 2x + 2x) + (3 - 5) = (3x) + (-2) = 3x - 2
\]

4. **Expression**: \(2x + 2 + x\)
\[
= (2x + x) + 2 = 3x + 2
\]

Comparing each simplified expression to \(3x - 2\):

- The first three expressions all simplify to \(3x - 2\).
- The fourth expression simplifies to \(3x + 2\), which is not equivalent to \(3x - 2\).

Thus, the expression that is not equivalent to \(3x - 2\) is:
\[
\boxed{2x + 2 + x}
\]