Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{254^5+254^6}{254^3.254^2}=\frac{254^3.254^2+254^6}{254^3.254^2}=254^6\)
\(\frac{254^5+254^6}{254^3\cdot254^2}=\frac{254^5\left(1+254\right)}{254^5}=1+254=255\)
a)
316 - x=254
<=>x=316-254
<=>x=62
b
23+3x=5^6 : 5^3
<=>23 + 3x=5^3
<=>3x=5^3-23
<=>3x=102
<=>x=34
c
\(-3\le x\le0\)
<=>\(x\in\left\{-3;-2;-1;0\right\}\)
a)316-x=254
x=316-254
x=62
b)23+3x=5^6:5^3
23+3x=5^3
23+3x=125
3x=125-23
3x=102
x=102:3
x=34
c) x thuoc{-2;-1;0}
2.(x+5)+126=x+1000-254
2.x+10+126=x+746
x+x+136=x+746
=>x+136=746
x=746-136
x=610
chúc bạn học tốt nha
314 + ( x - 125 ) = 512
<=>x-125=512-314=198
<=>x=198+125
<=>x=323
vậy x=323
3 . x + 142 = 190
<=>3x=190-142
<=>3x=48
<=>x=48:3=16
vậy x=16
k mk nha
\(284:\left[314-\left(x+3\right)\right]=12.\)
\(\Leftrightarrow\left[314-\left(x+3\right)\right]=\frac{71}{3}\)
\(\Leftrightarrow\left(x+3\right)=\frac{871}{3}\)
\(\Leftrightarrow x=\frac{862}{3}\)
\(14.\left[251-\left(x-5\right)\right]=1470\)
\(\Leftrightarrow\left[251-\left(x-5\right)\right]=105\)
\(\Leftrightarrow x-5=146\)
\(\Leftrightarrow x=151\)
\(\left(120+x\right):x-15=16\)
\(\Leftrightarrow\left(120+x\right):x=31\)
\(\Leftrightarrow\left(120+x\right).\frac{1}{x}=31\)
\(\Leftrightarrow\frac{1}{x}.x+120x=31\)
\(\Leftrightarrow1+120x=31\)
\(\Leftrightarrow120x=30\)
\(\Leftrightarrow x=4\)
\(\left(135-x\right):x+24=28\)
\(\Leftrightarrow\left(135-x\right):x=4\)
\(\Leftrightarrow\left(135-x\right).\frac{1}{x}=4\)
\(\Leftrightarrow\frac{1}{x}.135-\frac{1}{x}x=4\)
\(\Leftrightarrow\frac{1}{x}135-1=4\)
\(\Leftrightarrow\frac{1}{x}135=5\)
\(\Leftrightarrow\frac{1}{x}=\frac{1}{27}\)
\(\Leftrightarrow x=27\)
x - 254 = 5100 : 598
x - 254 = 52
x - 254 = 25
x = 25 + 254
x = 279
-314 - 3.(5 + x) = -254
3.(5 + x) = -314 + 254
3.(5 + x) = -60
5 + x = -60 : 3
5 + x = -20
x = -20 - 5
x = -25
-314 - 3.(5 + x) = -254
3.(5 + x) = -314 - (-254)
3.(5 + x) = -314 + 254
3.(5 + x) = -60
5 + x = -60 : 3
5 + x = -20
x = -20 - 5
x = 25