Question

como calcular a expressao 9-4X-4=X+7-1

Answer 1

9-4x -4= x + 7-1
5-4x=x+6
5-4x-x-6=0
-5x-1=0
-5x=1  *(-1)
5x=-1
x= -1
     5

Answer 2

$9-4x-4=x+7-1\to \\\\ -4x-x=7-1-9+4\to \\\\ -5x=1(-1)\to \\\\ 5x=-1\to \\\\ x=- \frac{1}{5} \\\\ ou\\\\ x=-0,2$