Bonjours svp, vous pouvez m'aider, merciii beaucoupp
Sachant que a \geq b , comparer

a) a + 25 et b + 25

b) -10a et -10b

c) 2/5 a - 8 et 2/5 - 8
d) - 7b/9 +1 et -7a/9 +1


merci!
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