Question

giúp zới

 

Answer 1

b) 3-5x+4=-12

-5x=-12-4-3

-5x=-19

x=\(\dfrac{19}{5}\)

Answer 2

3-(5x-4)=-12

<=> 3-5x+4=-12

<=> -5x= -12-3-4

<=> -5x= -19

<=> x=\(\dfrac{19}{5}\)