13/2^2.3^2.5;14/2^3.3.5 và 5/3.5^2.7
\(\left(3X-2^2.3\right):8+2.5=13\)
giúp mình với nha
\(\left(3x-2^2.3\right):8+2.5=13\)
\(\Leftrightarrow\left(3x-4.3\right):8+10=13\)
\(\Leftrightarrow\left(3x-12\right):8=13-10\)
\(\Leftrightarrow\left(3x-12\right):8=3\)
\(\Leftrightarrow3x-12=24\)
\(\Leftrightarrow3x=36\)
\(\Leftrightarrow x=12\)
Vậy ................
Tính tổng hợp lí:
E=5/2.3+4/1.11+3/11.2+1/2.5+13/15.4
(19x+2.52):14=(13-18)2.42
2.3x=10.312+8.274
tìm x:
a. (19x+2.52):14=(13-8)2-42
b) 2.3x=10.312+8.274
tìm x
[ 19x + 2.52] : 14 = {13 -82 ] - 42
2.3x = 10. 312 + 8. 274
1 ) tìm x
a) (19.x +2.52):14=(13-8)2-42
b)2.3x-10.312+8.272
Please help me
a) (19.x + 2.52): 14 = 9
19.x +2.52 = 9.14 =126
19.x+ 50 =126
19.x =126-50 =76
x = 76 :19 = 4
Câu b sao ko có đáp án tìm x vậy bn
minh lam lun nha ko ghi lai de dau
a, (19x + 2.25): 14 = 5^2 - 4^2 (25-16)
( 19x + 50) = 9. 14
19x+50= 126
19x=126-50
x= 76:19
x= 4
muc b ko co kt qua lam sao ma lam
tìm x biết
a) (19x+2.52):14=(13-8)2-42 b) 2.3x=10.312+8.274
a) ( 19x + 2.52 ) : 14 = ( 13 - 8 )2 - 42
<=> ( 19x + 2 . 25 ) : 14 = 25 - 16
<=> ( 19x + 50 ) : 14 = 9
<=> 19x + 50 = 9 . 14
<=> 19x + 50 = 126
<=> 19x = 126 - 50
<=> 19x = 76
<=> x = 76 : 19
<=> x = 4
a) ( 19x + 2.52 ) : 14 = ( 13 - 8 )2 - 42
<=> ( 19x + 2 . 25 ) : 14 = 25 - 16
<=> ( 19x + 50 ) : 14 = 9
<=> 19x + 50 = 9 . 14
<=> 19x + 50 = 126
<=> 19x = 126 - 50
<=> 19x = 76
<=> x = 76 : 19
<=> x = 4
~Chúc bn nào k mk học giỏi~
Riêng biệt bn I love you k mk sẽ may mắn cả lắm đó nhé
Tim x
a) 10^x=1^x
B)X^10=x
c) x^10=1^x
d)2.3^x=10.3^12+8.27^4
e) (19x+2.5^2):14=(13-8)^2-4^2
10^X=1^X
Do 1^mấy cũng =1
=>10^x=1
=>x=0
2^3.3/2^2.3^2.5
\(\frac{2^3.3}{2^2.3^2.5}=\frac{2}{3.5}=\frac{2}{15}\)
\(2^3.\frac{3}{2^2}.3^2.5=8.\frac{3}{4}.9.5=6.9.5=54.5=270\)
76-{ 2.[ 2.5^2-(31-2.3)] }+ 3.25
76 - { 2 . [ 2 . 52 - ( 31 - 2.3 ) ] } + 3. 25
= 76 - { 2 .[ 50 - ( 31 - 6 ) ] } + 75
= 76 - {2 . [ 50 - 25 ] } + 75
= 76 - { 2 . 25 } + 75
= 76 - 100 + 75
= 51.