bonsoir
- 21 : ( 2 - 5 ) x ( - 1 - 4 )
= - 21 : ( - 3 ) x ( - 5 )
= - 21 : 15
= - 21/15 = - 7/5
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bonsoir
- 21 : ( 2 - 5 ) x ( - 1 - 4 )
= - 21 : ( - 3 ) x ( - 5 )
= - 21 : 15
= - 21/15 = - 7/5