a = 999
a×(2+3)+2017=7012
a×5+2017=7012
a×5=7012-2017
a×5=4995
a=4995:5
a=999
kb với mình
a x 2 + a x 3 + 2017 = 7012
<=> a x 2 + a x 3 = 4995
<=> a x ( 2 + 3 ) = 4995
<=> a x 5 = 4995
<=> a = 999
Vậy : a = 999
a x 2+ a x 3 + 2017 = 7012
a x ( 2 + 3 ) + 2017 = 7012
a x 5 = 7012 - 2017
a x 5 = 4995
a = 4995 : 5
a = 999
