( 17 x – 25 ) : 8 + 65 = 9 mũ 2 Question ( 17 x – 25 ) : 8 + 65 = 9 mũ 2 in progress 0 Môn Toán Ladonna 4 years 2020-11-20T06:12:12+00:00 2020-11-20T06:12:12+00:00 2 Answers 143 views 0
Answers ( )
$↓$
$(17x-25):8+65=9²$
$⇔ (17x-25):8+65=81$
$⇔ 17x-25+250=648$
$⇔ 17x+495=648$
$⇔ 17x=153$
$⇔ x=9$
( 17 x – 25 ) : 8 + 65 = $9^{2}$
( 17 x – 25 ) : 8 = 81 – 65
( 17 x – 25 ) : 8 =16
( 17 x – 25 ) = 16.8
( 17 x – 25 )=128
17 x =128 + 25
17 x =153
x = 153 : 17
x =9