5.\(3^x=8.3^1+7.3^9\)
tim x biet
X+35=-22-X
(6X-4^2) .7^8=2.7^9
5.3^x-1-7.3^12=8.3^12
3.(x-15)^3=-24
lx+18l=10
\(\frac{27^6.81^8.3^9}{3^7.3^6.3^{15}}\)
Rút gọn
\(\frac{27^6.81^8.3^9}{3^7.3^6.3^{15}}=\frac{\left(3^3\right)^6.\left(3^4\right)^8.3^9}{3^7.3^6.3^{15}}=\frac{3^{18}.3^{32}.3^9}{3^7.3^6.3^{15}}\)
= \(\frac{3^{59}}{3^{28}}=3^{59}:3^{28}=3^{31}\)
5 .3^x=8.3^9+7.27^3
5.\(3^x\) = 8.39 + 7.273
5.\(3^x\) = 8.39 + 7.(33)3
5.\(3^x\) = 8.39 + 7.39
5.\(3^x\) = 39.( 8 + 7)
5.\(3^x\) = 39. 15
\(3^x\) = 39.15:5
\(3^x\) = 39.3
\(3^x\)= 310
\(x\) = 10
Vậy \(x\) = 10
9^11:3^21-(1/3)^8.3^9
Tìm x,biết
A) (-3)^2x=9^5
B) 9.5^ x-3=6.5^6+3.5^6
C) 5^x+4-3.5^x+3=5^11.2
D) 3^x+2+4.3^x+1=7.3^6
E) 5^x+3=10^5.6^3:4^4.3^3
Tìm x biết 5/7.3.x - 8/5=35/9
1. Tìm số tự nhiên x biết
a. 37-7.(x+1)=40-8.3
b. (x+5).3+11=10+(3+4).4
c. 25-5.3+4.10=100-5.x
d. 36+2.(x-7)=12+8.(3+5)-36
e. 3.(x+7)-9=11.5-5-8
(ai biết giúp mình, mình tick cho nhé)
a. 37-7.(x+1)=40-8.3
37 - 7(x+1) = 16
7(x+1) = 21
x+1 = 3
x=2
b. (x+5).3=11=10+(3+4).4
(sao có 2 dấu bằng, dấu nào là dấu cộng do viết nhầm ???)
c. 25-5.3+4.10=100-5.x
50 = 100 - 5x
5x = 50
x=10
d. 36+2.(x-7)=12+8.(3+5)-36
36 + 2(x-7) = 40
2(x-7) = 4
x-7 =2
x=9
e. 3.(x+7)-9=11.5-5-8
3(x+7) - 9 = 42
3(x+7) = 51
x+7 = 17
x=10
2.3=
3.3=
4.3=
5.3=
6.3=
7.3=
8.3=
9.3=
10.3=
Ai tick mk mk tick lại
6
9
12
15
18
21
24
27
30
lAM THI TUI LAM CHU K THI KHONG
15) {x\(^2\) - ( 8\(^2\) - ( 5\(^2\) - 8.3)\(^3\) - 7 . 9]\(^3\)- 4.12} = 1
16) /x - 2/ = 10
15: \(\Leftrightarrow\left\{x^2-\left[8^2-\left(25-24\right)^3-63\right]^3-48\right\}=1\)
\(\Leftrightarrow x^2-48=1\)
=>x=7 hoặc x=-7