Question

9supra 2=(2×a +1):3 supra2

Answer 1

9/2=(2×a+1): 3/2
2×a+1=3/2×9/2
2×a+1=27/4
2×a=27/4-1/1
2×a=27-4×1 totul supra /4
2×a=23/4
a=23/4 : 2/1
a=23/4 ×1/2
a=23/4×2
a=23/8


proba
(2/1×23/8 +1/1):3/2=
=(2×23 totul supra/1×8 +1/1):3/2=
=(46/8simplificat cu 2 +1/1):3/2=
=(23/4+1/1):3/2=
=23+4×1 totul supra/4 :3/2=
=27/4:3/2=
=27/4 ×2/3=
=9×1 totul supra /2×1=
=9/2 ( adevarat )