Bonjour,j'aurai besoin d'aide pour mon DM de maths(4eme) a rendre mardi ! c'est sur les equations merci davance
a. 14 x-7=8x+5
6x/6=12/6
x=2
b. 8a-2=3*(4a-5)
8a-2=12a-15
-4a/-4=-13/-4
a=3.25
c.2*(3b+7)=5*(-2b+1)
6b+14=-10b+5
16b/16=-9/16
b=-9/16
d. 3*(-1-2t)=4*(1-5t)
-3-6t=4-20t
14t/14=7/14
t=1/2
Bonjour,
a)
b)
c)
d)
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Verified answer
a. 14 x-7=8x+5
6x/6=12/6
x=2
b. 8a-2=3*(4a-5)
8a-2=12a-15
-4a/-4=-13/-4
a=3.25
c.2*(3b+7)=5*(-2b+1)
6b+14=-10b+5
16b/16=-9/16
b=-9/16
d. 3*(-1-2t)=4*(1-5t)
-3-6t=4-20t
14t/14=7/14
t=1/2
Bonjour,
a)
b)
c)
d)