$a,4-27+3=x-13+4$$<=> 4-27+3+13-4=x$$<=>-11=x$b,5x+17=2+(-25)<=>5x+17-2+25=0<=>5x+40=0<=>x=-40:5=-8
$a,4-27+3=x-13+4$$<=> 4-27+3+13-4=x$$<=>-11=x$b,5x+17=2+(-25)<=>5x+17-2+25=0<=>5x+40=0<=>x=-40:5=8
$a,4-27+3=x-13+4$$<=> 4-27+3+13-4=x$$<=>-11=x$b,5x+17=2+(-25)<=>5x+17-2+25=0<=>5x+40=0<=>x=-40:5=
-8