Question

Resolva as equações:
a) x-3=-1
b) 2x+7=-9
c) 3x-9=36
d) 4x+17=3x-2
e) 5x+19=13x-16
f) 5(x+1)=15

Answer 1

Olá,

Vamos lá,


a) x-3=-1
x = -1 + 3
x = 2


b) 2x+7=-9
2x = -9 - 7
2x = -16
x = -16/2
x = -8


c) 3x-9=36
3x = 36 + 9
3x = 45
x = 45/3
x=15


d) 4x+17=3x-2
4x - 3x = -2 - 17
x = -19


e) 5x+19=13x-16
5x - 13x = -16 - 19
-8x = -35
x = 35/8

f) 5(x+1)=15
5x + 5 = 15
5x = 15 - 5
5x = 10
x = 10/5
x= 2

Answer 2

OLÁ,
a) X-3=-1
  X=-1+3
  X=2

b) 2X+7=-9
    2X=-9-7
     2X=-16
  X=-16/2 =-8

C)3X-9=36
    3X=36+9
     3X=45
  X=45/3=15

d)4X+17=3X-2
  4X-3X=-2-17
        X=-19
e)5X+19=13X-16
 5X-13X=-16-19
-8X=-35C (-1)
       8x=35
      x=35/8

f) Multiplica e vai ficar
 5X+5=15
5X=15-5
5X=10
X=10/5
X=2

Espero ter ajudado.