Các bạn giai giup mk bai 1, bai 2 nha. Ai giai dung, nhanh mk tick cho
MOI NGUOI GIUP MK GIAI BAI NAY NHA.
TIM X, BIET
a. x-1 chia het cho x-3 (x-1 : x-3)
b. x+6 chia het cho x-1 (x-6 : x-1)
c. x chia het cho x-5 (x:x-5) MK HUA SE TICK CHO AI GIAI DUNG@@@@@
\(a,x-1⋮x-3\)
\(\Rightarrow x-3+2⋮x-3\)
\(\Rightarrow2⋮x-3\)
\(x-3=\left\{-2;-1;1;2\right\}\)
\(x=\left\{1;2;4;5\right\}\)
\(b,x+6⋮x-1\)
\(\Rightarrow x-1+7⋮x-1\)
\(\Rightarrow7⋮x-1\)
\(x=\left\{-6;0;2;8\right\}\)
\(c,x⋮x-5\)
\(x-5+5⋮x-5\)
\(5⋮x-5\)
\(x=\left\{0;4;6;11\right\}\)
Giúp mk nha mk cần gấp!! mk tick cho 5 bạn
đáp án là b, nha
3/x+5=15%
giup mk giai bai nay nhanh nha
\(\frac{3}{x+5}=15\%\)
\(\frac{3}{x+5}=\frac{15}{100}\)
\(\frac{3}{x+5}=\frac{3}{20}\)
\(\Rightarrow x+5=20\)
\(\Rightarrow x=20-5\)
\(\Rightarrow x=15\)
~ Thiên mã ~
\(\frac{3}{x}+5=15\%\)
\(\frac{3}{x}+5=\frac{3}{20}\)
\(\frac{3}{x}=\frac{3}{20}-5\)
\(\frac{3}{x}=\frac{-97}{20}\)
\(\Rightarrow\left(-97\right)x=3.20\)
\(\Rightarrow\left(-97\right)x=60\)
\(\Rightarrow x=60:\left(-97\right)\)
\(\Rightarrow x=\frac{-60}{97}\)
~ Hok tốt ~
\(\frac{3}{X}\)+5=\(\frac{15}{100}\)
\(\frac{3}{X}\)+5=\(\frac{3}{20}\)
\(\frac{3}{X}\)=\(\frac{3}{20}\)-5
\(\frac{3}{X}\)=\(-\frac{97}{20}\)
X=\(-\frac{97}{20}\)\(:\)3
X=\(-\frac{97}{60}\)
\(\left(3x+1\right)^2-4.\left(x-2\right)^2\)=
Giai dung nha, ai giai dung mk tick cho
Cung la bai phan tich da thuc thanh nhan tu dung hang dang thuc(cua lop 8)
\(\Leftrightarrow\left(3x-1\right)^2-4^2=0\)
\(\Leftrightarrow\left(3x-1-4\right)\left(3x-1+4\right)=0\)
\(\Leftrightarrow\left(3x-5\right)\left(3x+3\right)=0\Leftrightarrow\orbr{\begin{cases}3x-5=0\\3x+3=0\end{cases}\Leftrightarrow\orbr{\begin{cases}x=\frac{5}{3}\\x=-1\end{cases}}}\)
Tĩm x để B = 2x + 3/ 5x - 1 là số nguyên
Các ban giai giup mk nha ai giai dung mk tick cho
bai 1 : cho 21 so nguyen trong do tong 5 so bat ki la 1 so duong. cmr tong 21 so nguyen do la 1 so duong.
giup mk nha mina.....mk tick cho ban nao giai dung nhat ( ghi ro cach trinh bay nhe)
ai giup minh giai bai 88, 84 sbt toan 7 hinh hoc tap 1 voi
ai nhanh nhat va dung minh se tick cho
Cac ban giup mik giai bai so 3,o luyen tap chung trang 176 nha.
Ai giai dc nhanh nhat mik tick cho.
tim x
2/x =5/6
giup mk giai bai nay nhe mk se tic dung cho
\(\frac{2}{x}=\frac{5}{6}\Rightarrow x=\frac{2\times6}{5}=\frac{12}{5}\)