`(19x + 2 . 5^2) : 14 = (13 - 8)^2 - 4^2`
`(19x + 2 . 5^2) : 14 = 5^2 - 4^2`
`(19x + 2 . 25) : 14 = 25 - 16`
`(19x + 2 . 25) : 14 = 9`
`19x + 2 . 25 = 9 . 14`
`19x + 50 = 126`
`19x = 126 - 50`
`19x = 76`
` x = 76 : 19`
` x = 4`
Vậy `x = 4`
Tìm x biết:\(\left(19x+2.5^2\right):14=\left(13-8\right)^2-4^2\)
tìm x biết
\(\frac{19x+2.5^2}{14}=\left[13-8\right]^2-4^2\)
a) \(\left(19x+2.5^2\right):14=\left(13-8\right)^2-4^2\)
b) \(x+\left(x+1\right)+\left(x+2\right)+...+\left(x+30\right)=1240\)
c) \(|x+7|=20+5.\left(-3\right)\)
Tìm x,biết :
a)\(\left(19x+2.5^2\right):14=\left(13-8\right)^2-4^2\)
b)x+(x+1)+(x+2)+...+(x+30)=1240
c)11-(-53+x)=97
d)-(x+84)+213=-16
Tìm x:
1) \(2\cdot3^x=10\cdot3^{12}+8\cdot27^4\)
2) \(\left(19x+2\cdot5^2\right):14=\left(13-8\right)^2-4^2\)
Tìm x:
1) \(\left(2x-15\right)^5=\left(2x-15\right)^3\)
2) \(2\cdot3^x=10\cdot3^{12}+8\cdot27^4\)
3) \(\left(19x+2\cdot5^2\right):14=\left(13-8\right)^2-4^2\)
Tìm x biết:
\(a\)) \(\left(19x+2.5^2\right):14=\left(13-8\right)^2-4^2\)
\(b\)) \(x+\left(x+1\right)+\left(x+2\right)+...+\left(x+30\right)=1240\)
\(c\)) \(11-\left(-53+x\right)=97\)
Tìm x
a) \(\left(19.x+2.5^1\right):14=\left(13-8\right)^2-4^2\)
b) \(-\left(x+84\right)+213=-16\)
Bài 2 : Tìm x , biết :
a, \(\left(19x+2\cdot5^2\right)\text{ : }14=\left(13-8\right)^2-4^2\)
b, \(x+\left(x+1\right)+\left(x+2\right)+\left(x+3\right)+...+\left(x+30\right)=1240\)
c, \(11-\left(-53+x\right)=97\)
d, \(-\left(x+84\right)+213=-16\)
e, \(13-12+11+10-9+8-7-6+5-4+3+2-1=x\)
a, \(\left(19x+2.5^2\right):14=\left(13-8\right)^2-4^2\) b, \(x+\left(x+1\right)+\left(x+2\right)+....+\left(x+30\right)=1240\)
