Question

A) 10x - 9 = 5x - 6
B) 4x - 2 = - 5x + 7
C) 2x - 1 + 6x = - 7x + 4
D)8x + 3 = 5x - 2 - 2x
E) 12 + 4x = 3 + 7x – 9

Answer 1

resposta: olá

a) 10x -9= 5x -6

10x -5x = -6 +9

5x = +3

x= 3/5

x= 0,6

b) 4x -2 = -5x +7

4x +5x= +7+2

9x=+9

x= 9/9

x= 1

c) 2x -1 +6x = -7x +4

2x+6x+7x = +4 +1

15x = +5

x= 5/15

x= 0,333...

d) 8x +3=5x -2 -2x

8x-5x +2x= -2 -3

10x -5x= -5

5x= -5

x= -5/5

x= -1

e) 12 +4x = 3+7x -9

+4x -7x = -9 +3 -12

-3x= - 18 (-1)

3x =18

x= 18/ 3

×= 6

espero ter ajudado!