Respuesta :

Step-by-step explanation:

[tex]35 + 35 = 70[/tex]

[tex]180 - 70 = 110[/tex]

[tex]180 - 110 = 70[/tex]

[tex]70 + 70 = 140[/tex]

[tex]180 - 140 = 40 [/tex]

so the answer is 40

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