Resoudre Chaque equation : a ) -2x + 7 =12 b)-2 + 3y = -6 c)5-2a=12 d)[tex]- \frac{1}{2} =- \frac{3}{2} t- \frac{5}{2} [/tex] e)3x+7=x+ 2 f)2 + 2y = -1 + 3y g)4
Mathématiques
monsieursofiane
Question
Resoudre Chaque equation :
a ) -2x + 7 =12
b)-2 + 3y = -6
c)5-2a=12
d)[tex]- \frac{1}{2} =- \frac{3}{2} t- \frac{5}{2} [/tex]
e)3x+7=x+ 2
f)2 + 2y = -1 + 3y
g)4-5a = 2a-1
h)t-4 = -3t -10
a ) -2x + 7 =12
b)-2 + 3y = -6
c)5-2a=12
d)[tex]- \frac{1}{2} =- \frac{3}{2} t- \frac{5}{2} [/tex]
e)3x+7=x+ 2
f)2 + 2y = -1 + 3y
g)4-5a = 2a-1
h)t-4 = -3t -10
1 Réponse
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1. Réponse maudmarine
a )
- 2x + 7 = 12
- 2x = 12 - 7
- 2x = 5
x = - 5/2
b)
- 2 + 3y = - 6
3y = - 6 + 2
3y = - 4
y = - 4/3
c)
5 - 2a = 12
- 2a = 12 - 5
- 2a = 7
a = - 7/2
d)
3/2t = 1/2 - 5/2
3/2t = - 4/2
t = -4/2 x 2/3
t = -8/6
t = -4/3
e)
3x + 7 = x + 2
3x - x = 2 - 7
2x = - 5
x = - 5/2
f)
2 + 2y = -1 + 3y
2y - 3y = - 1 - 2
- y = - 3
y = 3
g)
4 - 5a = 2a - 1
- 5a - 2a = - 1 - 4
- 7a = - 5
a = 5/7
h)
t - 4 = - 3t - 10
t + 3t = - 10 + 4
4t = - 6
t = - 6/4
t = - 3/2