Sagot :
bonjour
Programme A
x
x - 5
7 ( x - 5 ) = 7 x - 35
7 x - 35 - 2 x
= 5 x - 35
avec 6 = 5 * 6 - 35 = 30 - 35 = - 5
avec - 4 = 5 * -4 - 35 = - 20 - 35 = - 55
Programme B
x
- 3 x
- 3 x - 5
= - 3 x - 5
avec 5 = 5 * - 3 - 5 = - 15 - 5 = - 20
avec - 3 = - 3 * - 3 - 5 = 9 - 5 = 4
5 x - 35 = - 3 x - 5
5 x + 3 x = - 5 + 35
8 x = 30
x = 30/8 = 3.75
il faut choisir 3.75
Bonjour,
1)
6
6-5 = 1
1*7 = 7
7 - 12 = -5
2)
5
5*-3 = -15
-15 -5 = -10
3)
-4
-4-5 = -9
-9*7 = -63
-63 -(-8) = -63 +8 = -55
4)
-3
-3*-3 = 9
9-5 = 4
5)
programme A
[(x-5 )7 ] -2x
= 7x-35 -2x = 5x-35
Programme B
x
x*-3 = -3x
-3x-5
6)
5x-35 = -3x-5
5x+3x = -5 +35
8x = 30
x = 30/8 = 3,75