matematikk.net

oppgaven er:
5-2(x+3)=6+4(2-x)-x=

5-2(x+3) = 6+4(2-x)-x=
5-(2*x+2*3) = 6+(4*2-4*x)-x
5-(2x+6) = 6+(8-4x)-x
5-2x-6 = 6+8-4x-x
-2x+4x+x = 6+8-5+6
3x = 15
3x/3 = 15/3
x = 5