Question

tìm x biết : ( 19x + 2.5^2 ) : 14 = ( 13 - 8 ) ^ 2 - 4 ^2

Answer 1

( 19x + 2.5² ) : 14 = ( 13 - 8 )²- 4 ²

( 19x + 2.5² ) : 14 = 5²- 4 ²

( 19x + 2.5² ) : 14 = 25- 16

( 19x + 2.5² ) : 14 =9

( 19x + 50 ) : 14 =9

 19x + 50=9 . 14

 19x + 50=126

19x=126-50

19x=76

x=76:19

x=4

Answer 2

vbawngf 4 bạn nhé chắc chắn 100%

Answer 3

gan gon hon nha

(19x+2*5^2)/14=(13-8)^2-4^

(19x+2*25)/14=(13-8)^2-16

(19x+2.25)/14=5^-16

(19x+2.25)/14=25-16

(19+2.25)=9*14

19X=126+50

x=76/19

x=4

Answer 4

Ban kia lam dung roi do 

k tui nha

thanks

Answer 5

\(\left(19x+2.5^2\right):14=\left(13-8\right)^2-4^2\)

\(\left(19x+2.25\right):14=5^2-16\)

\(\left(19x+50\right):14=25-16\)

\(\left(19x+50\right):14=9\)

\(\left(19x+50\right)=9\times14=126\)

\(19x=126-50=76\)

\(x=76:19\)

\(x=4\)

Answer 6

bằng 4 chứ gì

Answer 7

126-50

Answer 8

\(\left(19x+2.5^2\right)\div14=\left(13-8\right)^2-4^2\)

\(\Leftrightarrow\left(19x+2.25\right)\div14=5^2-16\)

\(\Leftrightarrow\left(19x+50\right)\div14=25-16\)

\(\Leftrightarrow\left(19x+50\right)\div14=9\)

\(\Leftrightarrow19x+50=9.14\)

\(\Leftrightarrow19x+50=126\)

\(\Leftrightarrow19x=126-50\)

\(\Leftrightarrow19x=76\)

\(\Leftrightarrow x=76\div19\)

\(\Leftrightarrow x=4\)

Vậy x = 4