Question

Resolva as equações:

A) 3x + 5 = 8x - 20

B) 6y + 15 = -4y -5

C) 6. (x - 2) + 5 -3x = 17

Answer 1

A) 3x+5=8x-20
5+20=8x-3x
25=5x
x=25/5
x=5

B)6y+15=-4y-5
6y+4y=-5-15
10y=-20
y=-20/10
y=-2

C)6.(x-2)+5-3x=17
6x-12+5-3x=17
6x-3x=17+12-5
3x=24
x=24/3
x=8

Answer 2

A) 3x - 8x = -20 -5

     -5x = - 25

       x= -25/-5

       x= 5

B) 6y + 4y = -5 -15

     10y = -20

      y = -20/10

       y= -2

C) 6x - 12 + 5 -3x = 17

      6x -3x = 17 + 12 - 5

        3x = 24

          x = 24/3

          x= 8