Question

resolva

a)4x+12=2x=8
b)x+12=-x+6
c)5x+7=3x-5

Answer 1

a)4x+12=2x=8
    4x - 2x = 8 - 12
    2x = -4
     x = -2

b)x+12=-x+6
    x + x = 6 - 12
    2x = -6
     x = -3

c)5x+7=3x-5
   5x - 3x = -5 - 7
   2x = -12
   x = -6

Answer 2

a)4x+12=2x+8
4x-2x=8-12
2x= -4
x=-4/2-->x= -2

b)x+12=-x+6
x+x=6-12
2x= -6
x= -6/2 ---> x=-3

c)5x+7=3x-5
5x-3x=-5-7
2x= -12
x =-12/2--> x= -6