Question

-7 x + 5 = - 8 x + 13 pfv me ajudem

- 2 x - 4 = - 5 x -19

- x + 4 = - 8 x - 39

4 x + 2 = -8 x + 62

Answer 1

Resposta:

a) -7x+5=-8x+13

-7x+8x=13-5

x=8

...

b) -2x-4=-5x-19

-2x+5x=-19+4

3x=-15

x=-15/3

x=-5

...

c) -x+4=-8x-39

-x+8x=-39-4

7x=-43

x=-43/7

x=-6,14

...

d) 4x+2=-8x+62

4x+8x=62-2

12x=60

x=60/12

x=5