Holi boli!
Resolvemos
a + b= 450
a - b = 100
-------------------
[tex]2a=550[/tex]
[tex]a=\frac{550}{2}[/tex]
[tex]a=275[/tex]
[tex]a+b = 450\\275+b=450\\b=450-275\\b=175[/tex]
Entonces
Espero te ayude ツ
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Resolvemos
a + b= 450
a - b = 100
-------------------
[tex]2a=550[/tex]
[tex]a=\frac{550}{2}[/tex]
[tex]a=275[/tex]
[tex]a+b = 450\\275+b=450\\b=450-275\\b=175[/tex]
Entonces
Los números son
a = 275
b = 175
Espero te ayude ツ