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Laurakittydu59
@Laurakittydu59
April 2019
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Résoudre chaque équations et vérifier :
a) 3(2 -3y) = -(y -2)
b) -2(a -1) = 4 (2a +1)
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Bonjour,
a) 3(2 -3y) = -(y -2)
6 - 9y = - y + 2
6 - 2 = - y + 9y
4 = 8y
4/8 = y
1/2 = y
S= {1/2}
b) -2(a -1) = 4 (2a +1)
- 2a + 2 = 8a + 4
- 2a - 8a = 4 - 2
- 10a = 2
- a = 2/10
a = - 2/10
a = - 1/5
S= {-1/5}
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Thanks 1
babysana23
a)
3(2 -3y) = -(y -2)
3*2+3*(-3y)=-y+2
6-9y=-y+2
6-9y-6+y=-y+2-6+y
-8y=-4
y=-4/-8
y=1/2
b)
-2(a -1) = 4 (2a +1)
-2*a-2*(-1)=4*2a+4*1
-2a+2=8a+4
-2a+2-2-8a=8a+4-8a-2
-10a=2
a=2/-10
a=1/-5
voilà :)
0 votes
Thanks 0
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a) 3(2 -3y) = -(y -2)
6 - 9y = - y + 2
6 - 2 = - y + 9y
4 = 8y
4/8 = y
1/2 = y
S= {1/2}
b) -2(a -1) = 4 (2a +1)
- 2a + 2 = 8a + 4
- 2a - 8a = 4 - 2
- 10a = 2
- a = 2/10
a = - 2/10
a = - 1/5
S= {-1/5}
3(2 -3y) = -(y -2)
3*2+3*(-3y)=-y+2
6-9y=-y+2
6-9y-6+y=-y+2-6+y
-8y=-4
y=-4/-8
y=1/2
b)
-2(a -1) = 4 (2a +1)
-2*a-2*(-1)=4*2a+4*1
-2a+2=8a+4
-2a+2-2-8a=8a+4-8a-2
-10a=2
a=2/-10
a=1/-5
voilà :)