Bonjour j'ai besoins d'aide pour mon DM. les calculs sont :
a) 2/3x + 1 = 2
b) 3/10x - 4/5 = 7/10
c) 3/4x - 2/3 = 5/6
d) 2/3x + 2/5 = 1/2x + 2/3
Merci d'avance
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Bonjour j'ai besoins d'aide pour mon DM. les calculs sont :
a) 2/3x + 1 = 2
b) 3/10x - 4/5 = 7/10
c) 3/4x - 2/3 = 5/6
d) 2/3x + 2/5 = 1/2x + 2/3
Merci d'avance
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a)2/3x+1=2
2/3x = 1 ; x= 3/2
b) 3/10x-4/5 = 7/10
3/10x = 7/10 + 4/5 = 7/10 + 8/10 = 15/10
x= 15/10* 10/3 = 150/30 = 15/3 = 5
c) 3/4x-2/3=5/6
3/4x = 5/6 + 4/6
x= 9/6 * 4/3 = 36/18 = 2
d) 2/3x+2/5 = 1/2x+2/3
2/3x-1/2x = 2/3-2/5
4/6x - 3/6x = 10/15 - 6/15
1/6x = 4/15
x = 4/15 * 6 = 24/15 = 8/5