Explicación paso a paso:
[tex]2x + 20 = 200 \\ 2x = 200 - 20 \\ 2x = 180 \\ x = \frac{180}{2} = 90 \\ x = 90[/tex]
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Explicación paso a paso:
[tex]2x + 20 = 200 \\ 2x = 200 - 20 \\ 2x = 180 \\ x = \frac{180}{2} = 90 \\ x = 90[/tex]