Respuesta :

Answer:

x = 40

Explanation:

The initial equation is:

2x - 21 = x + 19

To solve for x, add 21 to both sides:

2x - 21 + 21 = x + 19 + 21

2x = x + 40

Then, substrac x from both sides:

2x - x = x + 40 - x

x = 40

Therefore, the solution is:

x = 40

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