Question

Resolva as equações a seguir,sendo U=Z

a) 2x + 3 =9

b)-3x +5 = x +1

c)6x= -x + 16

d)9x -9 + 3x=15

e)5x +4=3x -x +3

f) 7x +8 -3x=20 - 4x +1


HELP-ME

Answer 1

a) 2x + 3 = 9

2x = 9 - 3

2x = 6

x = 6/2

x = 3

b) -3x + 5 = x + 1

-3x - x = 1 - 5

-4x = -4 (-1)

4x = 4

x = 1

c) 6x = -x + 16

6x + x = 16

7x = 16

x = 16/7

d) 9x - 9 + 3x = 15

9x + 3x = 15 + 9

12x = 24

x = 24/12

x = 2

e) 5x + 4 = 3x - x + 3

5x - 3x + x = 3 - 4

3x = -1

x = -1/3

f) 7x + 8 - 3x = 20 - 4x + 1

7x - 3x + 4x = 20 + 1 - 8

8x = 13

x = 13/8