Explicación paso a paso:
[tex]ejer4 \\ 35 + 35 + x = 180 \\ x = 110[/tex]
[tex]ejer5 \\ 2x + 15 = x + 35 \\ 2x - x = 35 - 15 \\ x = 20[/tex]
[tex]ejer9 \\ 3x - 40 = x + 30 \\ 2x = 70 \\ x = 35[/tex]
[tex]ejer10 \\ 40 = x + 5 + x + 5 \\ 40 - 10 = 2x \\ 30 = 2x \\ 15 = x[/tex]
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Explicación paso a paso:
[tex]ejer4 \\ 35 + 35 + x = 180 \\ x = 110[/tex]
[tex]ejer5 \\ 2x + 15 = x + 35 \\ 2x - x = 35 - 15 \\ x = 20[/tex]
[tex]ejer9 \\ 3x - 40 = x + 30 \\ 2x = 70 \\ x = 35[/tex]
[tex]ejer10 \\ 40 = x + 5 + x + 5 \\ 40 - 10 = 2x \\ 30 = 2x \\ 15 = x[/tex]