trouver x a)-3(x+5)=1-2(x+1) b)x-(7x-2)=5(2-x) c)1-(5-2x)=3-(2x-5)

a)
- 3(x + 5) = 1 - 2(x + 1)
- 3x - 15 = 1 - 2x - 2
- 15 - 1 + 2 = - 2x + 3x
- 14 = x

b)
x - (7x - 2) = 5(2 - x)
x - 7x + 2 = 10 - 5x
2 - 10 = - 5x + 7x - x
- 8 = x

c)
1 - (5 - 2x) = 3 - (2x - 5)
1 - 5 + 2x = 3 - 2x + 5
2x + 2x = 3 + 5 + 5 - 1
4x = 12
x = 12/4
x = 3

a)-3(x+5)=1-2(x+1)
-3x-15-1=-2x-2
-x-16=-2
-x=14
x=-14

b)x-7x+2=10-5x
-6x+5x=10-2
-x=8
x=-8

c)1-5+2x=3-2x+5
2x+2x=5+5-1+3
4x=12
x=3