Question

1. Resolva :

a.3x-16+2x+6=4x+22

b.x=52+85

c.4x-40+X+20+X=180

d.X+15

e.2y-10

Answer 1

a.
3x - 16 + 2x + 6 = 4x + 22
3x + 2x - 16 + 6 = 4x + 22
5x - 10 = 4x + 22
5x - 4x = 22 + 10
x = 32

b.
x=52+85
x = 137

c.
4x - 40 + x + 20 + x = 180
4x + x + x - 40 + 20 = 180
6x - 20 = 180
6x = 180 + 200
6x = 200
x = 200  (:2)        100
      ------         =  --------
        6     (:2)          3

d)
x + 15 = 0
x = - 15

e)
2y - 10 = 0
2y = 10
y = 10/2
y = 5