Question

Calcule Mentalmente:

4x=9x+9
4x=-8
x-11=0
x+2=5

Me ajudem pfvr

Answer 1

4x=9x+9
4x-9x=9
-5x=9
x=9/-5
x=-1,8

4x=-8
x=-8/4
x=-2

x-11=0
x=11

x+2=5
x=5-2
x=3