Question

me ajudem a resolver?
(a) 3.(2x-1)=1-4.(x-5)
(b) 4.(x+10)-2.(x-5)=0
(c) 3.(x+8)=2.(x+7)
(d) 3.(x-2)=7x-2x
(e) 5x-2.(x+6)=x+4
Me ajudem porfavor

Answer 1

(a) 3.(2x-1)=1-4.(x-5)
6x -3 = 1 - 4x + 5
6x + 4x = 1 + 5 + 3
10x = 9
x = 9/10    ou 0,9

(b) 4.(x+10)-2.(x-5)=0
4x + 40 - 2x + 10 = 0
4x - 2x = -40 - 10
2x = - 50
x = - 50/2
x = - 25


(c) 3.(x+8)=2.(x+7)
3x + 24 = 2x + 14
3x - 2x = 14 - 24
x = -10

d) 3.(x-2)=7x-2x
3x - 6 = 7x - 2x
3x + 2x - 7x = +6
5x - 7x = +6
-2x = 6 .(-1)
2x = -6
x = - 6/2
x = - 3


(e) 5x-2.(x+6)=x+4
5x - 2x - 12 = x + 4
5x - 2x - x = 4 + 12
5x - 3x = 16
2x = 16
x = 16/2
x= 8