\(\left(3x-2^2.3\right):8+2.5=13\)
\(\Leftrightarrow\left(3x-4.3\right):8+10=13\)
\(\Leftrightarrow\left(3x-12\right):8=13-10\)
\(\Leftrightarrow\left(3x-12\right):8=3\)
\(\Leftrightarrow3x-12=24\)
\(\Leftrightarrow3x=36\)
\(\Leftrightarrow x=12\)
Vậy ................
\(\left(19X+2.5^2\right):14=\left(13-8\right)^2-4^2\)
giúp mình với mình tích đúng cho
(19x+2.5 mũ 2 ) : 14 = ( 13 - 8 ) mũ 2 - 4 mũ 2
\(\text{Tìm x, biết:}\)
\(a\)) \(\left(19x+2.5^2\right):14=\left(13-8\right)^2-4^2\)
\(b\)) \(x+\left(x+1\right)+\left(x+2\right)+...+\left(x+30\right)=1240\)
\(c\)) \(11-\left(-53+x\right)=97\)
\(d\)) \(-\left(x+84\right)+213=-16\)
tìm x
a,{[(3x+14):22-3]:2}-1=0
b,10-{[x:4+17):10+3.24] :10}=5
c,2.52.32+{[2.53-(2x+4).5]:(22+3.5)}=453
d,(19x+2.52):14=(13-8)2-42
e,2.3x=10.312+8.274
f,[3(x+2):7].4=120
g,2480-4710:3+[200-(x-5)]=1010
NHANH LÊN GIÚP TỚ VỚI MAI TỚ PHẢI NỘP RÙI XIN MỌI NGƯỜI ĐÓ
RÚT GỌN
\(a,\dfrac{121.75.130.169}{39.60.11.198}\)
\(b,\dfrac{\left(3.4.2^{16}\right)^2}{11.2^{13}.4^{11}.16^9}\)
\(c,\dfrac{5.\left(2^2.3^2\right)^9.\left(2^2\right)^6-2.\left(2^2.3\right)^{14}.3^6}{5.2^{28}.3^{19}-7.2^{29}.3^{18}}\)
TÍNH HỢP LÍ
\(a,\left(10^2+11^2+12^2\right):\left(13^2+14^2\right)\)
TÍNH NHANH
\(a,13-12+11+10-9+8-7-6+-4+3+2-1\)
Tìm x, biết:
\(\frac{10^{10}+10^{11}+10^{12}}{13^2+14^2\left(2.3x^{-5}-2^3.3^2\right)}=2.5^2.5\)
\(B=\dfrac{\left(2^3.5^4.11\right).\left(2.5^2.11^2\right)}{\left(2^2.5^3.11\right)^2}\)
Tính giá trị biểu thức : A= \(\dfrac{5\left(2^2.3^2\right)^9.\left(2^2\right)^6-2\left(2^2.3\right)^{14}.3^4}{5.2^{28}.3^{18}-7.2^{29}.3^{18}}\)
Tính: \(A=\dfrac{5.\left(2^2.3^2\right)^9.\left(2^2\right)^6-2\left(2^2.3^{14}\right).3^4}{5.2^{28}.3^{18}-7.2^{19}.3^{18}}\)
