Question

1. Resolva as equações:

a) 5x-4=-7+1

b) -9x+8=-43

Answer 1

a)

5x - 4= - 7 + 1

5x= - 7 + 1 + 4

5x= - 2

x= - 2/5

b)

- 9x + 8= - 43

- 9x= - 43 - 8

- 9x= - 51>> .(-1)

9x= 51

x= 51/9