Question

Resolva as equações:
a) 7.(x-2)=5.(x+3)
b) 2.(x-5)+4.(x-1)=0
c) 3.(2x-1)= -2(x+3)
d) 7.(x-1)-2.(x-5)=x-5

Answer 1

a)7x -14 = 5x + 15
7x -5x = 15 +14
2x = 29
x = 29/2
x= 14.5

b)2x -10 +4x - 4 = 0
2x + 4x = 0+10 +4
6x = 14
x = 14/6
x = 2.33

c)6x -3 = -2x -6
6x +2x = -6 +3
8x =-3
x = -3/8
x=0.375

d)7x -7 -2x +10 = x -5
7x -2x -x = -5 +7-10
4x = -8
x = -8/4
x= -2

Answer 2

a) 7.(x-2)=5.(x+3)

7x - 14 = 5x + 15
7x - 5x = 15 + 14
2x = 29
x= 29/2
x= 14,5

b) 2.(x-5)+4.(x-1)=0
2x - 10 + 4x - 4 =0
2x + 4x = 10 - 4
6x = 14
x= 14/6
x= 2,33

c) 3.(2x-1)= -2(x+3)
6x - 3 = -2x - 6
6x + 2x = - 6 + 3
8x = -3
x= -3/8
x= 0,375

d) 7.(x-1)-2.(x-5)=x-5
7x - 7 - 2x + 10 = x - 5
7x - 2x - x = -5 + 7 - 10
4x = -8
x = -8/4
x= -2

Espero ter ajudado.