Question

Resolva as equações

a)3x+12=x-8
b) 4x=2x-16
c) 5x-13=-2x+8
d) -3x+8=2x-12

Answer 1

A)3x+12=x-8
   3x-x=-8-12
   2x=-20
     x=-20/2     x=-10


B)4x=2x-16
   4x-2x=-16
   2x=-16
     x=-16/2    x=-8


C)5x-13=-2x+8
   5x+2x=8+13
   7x=21
     x=21/7    x=3


D)-3x+8=2x-12
   -3x-2x=-12-8
   -5x=-20
      x=-20/5    x=4


Espero ter Ajudado! Boa Tarde!

Answer 2

a)3x+12=x-8
3x-x=-8-12
2x=-20
x=-20/2
x=-10

b)4x=2x-16
4x-2x=-16
2x=-16
x=-16/2
x=-8

c)5x-13=-2x+8
5x+2x=8+13
7x=21
x=21/7
x=3

d)-3x+8=2x-12
-3x-2x=-12-8
-5x=-20 (-1)
5x=20
x=20/5
x=4

Espero ter ajudado =]