Rezolvare in necunoscuta x
(x-47)×2=a+13
2x-94=a+13
2x=a+13+94
2x=a+107
x=1supra2 a+107supra2
x=1supra2 a+107supra2, a apartie R
Rezolvare in necunoscuta a
-a=13-2x+94
-a=107-2x
a=-107+2x
a=-107+2x, x apartine R