Question

Resolva as equações
a) 20x - 4 = 5x
b) 5(1- x) - 2x + 1 = -3(2 + x)
c) 2 + 3[x -(3x + 1)]=5[x -( 2x - 1)]
d) 4(x - 3) = 2x -5

Answer 1

a)20x - 5x = 4
15x=4
x=4/15

b)5 - 5x - 2x + 1 = -6 -3x
-7x+3x=-6+5+1
-4x=0
x=0/4

c)2+3[x-3x-1]=5[x-2x+1]
2+3[-2x-1]=5[-x+1]
2-6x-3=-5x+5
-6x+5x=5+3-2
-x=6 .(-1)
x=-6

d)4x-12=2x-5
4x-2x=-5+12
2x=7
x=7/2