Question

resolva as equações: a)3x-1 =16 b) 2x+3(x-3)=16 c)2 (x -1)+ 3(x +2) =20 d) 3x -4 = x +2 e)2x +8-(x+2) =14

Answer 1

a) 3x - 1 = 16
3x = 16 + 1
x = 17/3

b) 2x + 3(x - 3) = 16
2x + 3x - 9 = 16
5x = 16 + 9
5x = 25
x = 25/5 = 5

c) 2(x-1) + 3(x+2) = 20
2x -2 + 3x + 6 = 20
5x = 20 -6 + 2
5x = 16
x = 16/5

d) 3x - 4 = x + 2
3x - x = 2 + 4
2x = 6
 x= 6/2
x = 3

e) 2x + 8 -(x+2) = 14
2x + 8 -x -2 = 14
2x - x = 14 + 2 - 8
x = 8