Sagot :
Explications étape par étape:
1.
3(2x-3)+x=5
6x-9+x=5
7x=9+5
7x=14
7x\7=14\7
x=2
2.
5-2(-x+3)=-2x
5+2x-6= -2x
2x + 2x = -5 +6
4x = 1
x = 1\4 ou 0,25
Bonjour,
1) 3(2x - 3) + x = 5
6x - 9 + x = 5
7x - 9 = 5
7x = 5 + 9
7x = 14
7x / 7 = 14 / 7
x = 2
2) 5 - 2(-x + 3) = -2x
5 - (-2x + 6) = -2x
5 + 2x - 6 = -2x
(-1) + 2x = -2x
(-1) = -2x - 2x
-4x = -1
-4x / -4 = -1 / -4
x = 1/4 = 0,25