(19x+2.\(5^2\): 14= (13-8)\(^2\)- \(4^2\)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
`( 19x + 2*5^2 ) : 14 = ( 13-8)^2 - 4^2`
`=> ( 19x + 50 ) : 14 = 5^2 - 4^2`
`=> ( 19x + 50 ) : 14 = 9`
`=> 19x + 50 = 9*14`
`=> 19x + 50 = 126`
`=> x = ( 126 - 50 )/19`
`=> x = 4`
Vậy `x=4`
(19x + 2.5\(^2\) ) : 14 = 5\(^2\)- 4\(^2\)
(19x + 2.5\(^2\) ) : 14 = 9
19x + 2.5\(^2\) = 9.14
19x + 50 = 126
19x = 126-50=76;19
x = 4
\(\Leftrightarrow\left(19x+50\right):14=5^2-4^2=9\)
=>19x+50=126
=>x=4
a) \(\left(19x+2\cdot5^2\right)\div14=\left(13-8\right)^2-4^2\)
\(\left(19x+2\cdot25\right)\div14=5^2-16\)
\(\left(19x+50\right)\div14=25-16=9\)
\(19x+50=9\cdot14=126\)
\(19x=126-50=76\)
\(x=76\div19=4\)
b) \(2\cdot3^x=10\cdot3^{12}+8\cdot\left(3^3\right)^4\)
\(2\cdot3^x=\left(10+8\right)\cdot3^{12}\)
\(2\cdot3^x=18\cdot3^{12}\)
\(\Rightarrow2\cdot3^x=2\cdot3^2\cdot3^{12}\Rightarrow2\cdot3^x=2\cdot3^{15}\Rightarrow x=15\)
a, \left(19.x+2.5^2\right)\div14=\left(13-8\right)^2-4^2(19.x+2.52)÷14=(13−8)2−42
\left(19.x+2.25\right)\div14=5^2-4^2(19.x+2.25)÷14=52−42
\left(19.x+2.25\right)\div14=25-16(19.x+2.25)÷14=25−16
\left(19.x+50\right)\div14=9(19.x+50)÷14=9
\left(19.x+50\right)=9.14(19.x+50)=9.14
19.x+50=12619.x+50=126
19.x=126-5019.x=126−50
19.x=7619.x=76
\Rightarrow x=76\div19⇒x=76÷19
\Rightarrow x=4⇒x=4
Vậy x = 4
b, 2.3^x=10.3^{12}+8.27^42.3x=10.312+8.274
2.3^x=10.3^{12}+8.\left(3^3\right)^42.3x=10.312+8.(33)4
2.3^x=10.3^{12}+8.3^{12}2.3x=10.312+8.312
2.3^x=\left(10+8\right).3^{12}2.3x=(10+8).312
2.3^x=18.3^{12}2.3x=18.312
2.3^x=2.3^3.3^{12}2.3x=2.33.312
2.3^x=2.3^{15}2.3x=2.315
\Rightarrow x=15⇒x=15
Vậy x = 15
(19x+2.5^2):14=(13-8)^2-4^2
(19x+2.25):14=5^2-16
(19x+50):14=25-16
(19x+50):14=9
19x+50=126
19x=76
x=4
(19x+2.5^2):14=(13-8)^2-4^2
=>(19x+2.25):14=5^2-4^2
=>(19x+50):14=(5-4).(5+4)
=>19x+50=1.9.14=126
=>19x=126-50=76
=>x=76:19=4
k nha
( 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
x = 4