Question

resolve as equações :
9-4x-4=x+7-1
16x+5-3=-2x-15
5 (y-9)-3= -18-y
10-6 (z-8)=9+z
12+2n=9 (n-7)-2
2x-5=x+4

Answer 1

9-4x-4=x+7-1
-4x-x = 7-1+4-9
-5x = 6+4-9
-5x=10-9
-5x=1 (-1)
5x=-1
x= -1 : 5
x= -5