Resoudre par combinaison
{-4x+2y=-1
{6x-5y=7

By: USER7811
27 Agustus 2025 mathematiques 5 minutes
4.5
56 views 56 comments 13 shares

Question

Grade: Education Subject: mathematiques
Resoudre par combinaison
{-4x+2y=-1
{6x-5y=7
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56 Viewed 56 Answers

Answer (56)

Best Answer
(249)
-4x+2y=-1
6x-5y=7

-20x+10y=-5
12x-10y=14

-8x=9
x=9/-8 = -1,125

-6,75-5y=7
-5y=7-6,75
-5y=0,25
y= 0,25/-5=-0,05

x= -1,125 ou 9/-8
y=-0,05 ou 0,25/5



Answered on 27 Agustus 2025
(352)
-4x+2y=-1 ⇔ 2y=4x-1                                                                                                       ⇔y=4x/2-1/2                                                                                                     ⇔y=2x-1/2


6x-5y=7     ⇔-5y=-6x+7
                 ⇔y=-6/-5+7/-5
                 ⇔y=6/5-7/5
Answered on 27 Agustus 2025

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