Question

Resolva as equações abaixo
a] -4x=8
b] 3x+17=19
c]  2x-1=x-10
d] 4[2x-5]=3-[-2x+1]
e] 4/5+x/2=x/3-1
 f]  x+3=2[x-1/2]

Answer 1

 a] -4x=8
        x = -8/4
        x = -2

b] 3x+17=19
    3x = 19 - 17
    3x = 2
    x = 2/3

c]  2x-1=x-10
     2x-x = -10 + 1
      x = -9

d] 4[2x-5]=3-[-2x+1]
    8x - 20 = 3 + 2x -1
    8x - 2x = 3 - 1 + 20
    6x = 22
    3x = 11
      x = 11/3

e] 4/5+x/2=x/3-1
    $\frac{4}{5}+\frac{x}{2}=\frac{x}{3}-1\\ 24+15x=10x-30\\ 24x-10x=-30-24\\ 14x=-54\\ 7x=-27\\ x=-\frac{27}{7}$

 f]  x+3=2[x-1/2]
     $x+3=2(x-\frac{1}{2})\\ x+3=2x-1\\ x-2x=-1-3\\ -x=-4\\ x=4$