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x + 2x - x - 1

  • Substitute 2 for x into the expression.

(2) + 2(2) - (2) - 1

  • Multiply 2 * 2 first.

(2) + (4) - (2) - 1

  • Solve from left to right.
  • (2 + 4) - 2 - 1 = 6 - 2 - 1

6 - 2 - 1

  • Solve from left to right.
  • (6 - 2) - 1 = 4 - 1

4 - 1 = 3

Your answer is 3.
The Equation is

x + 2x - x - 1 = 0

The Value of x = 2 ,

Putting in Equation , we get

2 + (2 × 2) - 2 - 1 = 0

2 + 4 - 2 - 1 = 0

6 - 3 = 0

The Answer is 3

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