2(x+2)-3(x-1)=4(2-x) | Klammern auflösen
2x + 4 - 3x + 3 = 8 - 4x
-x + 7 = 8 - 4x | -7, + 4x
3x = 1
x = 1/3
Rechne mal nach.
Probe:
2(1/3 +2)-3(1/3 -1)=4(2-1/3) ?
2( 1/3 + 6/3) - 3(1/3 - 3/3) =?= 4( 6/3 - 1/3)
2*7/3 - 3*(-2)/3 =?= 4*5/3
14/3 + 6/3 =?= 20/3
stimmt.