Sagot :
a) 4x-5 = 2x+3
<=> 2x-5 = 3
<=> 2x = 8
<=> x = 4
b) 4x-3 = x+1
<=> 3x-3 = 1
<=> 3x = 4
<=> x = 4/3
c) 2x-5 = -3x+10
<=> 5x-5 = 10
<=> 5x = 15
<=> x = 3
d) identique à la c) ?
Bonjour,
Je vais te montrer ci-dessous comment résoudre ces équations:
a) 4x-5=2x+3 b) 4x-3=x+1 c)2x-5= -3x+10 d) 2x-5= -3x+10
4x-2x=3+5 4x-x=1+3 2x+3x=10+5 2x+3x=10+5
2x=8 3x=4 5x=15 5x=15
x=8/2 x=4/3 x=15/5 x=15/5
x=4 x=3 x=3