Question

Resolva as seguintes equações: a) 3x-4=2x+8 b) 5x= -20 c) 2x-5= x-8 d) 2(x+1) - (x-1)=0 e) 8-4(3x-2)= 12​

Answer 1

a) 3x-4=2x+8

3x-2x=8+4

x=12

b) 5x= -20

x=-20/5

x=-4

c) 2x-5= x-8

2x-x=-8+5

x=-3

d) 2(x+1) - (x-1)=0

2x+2-x+1=0

2x-x=-2-1

x=-3

e) 8-4(3x-2)= 12​

4(3x-2)= 12​

12x-8=12

12x=12+8

12x=20

x=20/12