20-[7.(x-3)+4]=2
tim x nha cac ban
1, tim x
5+x-3=5-(x+4)
x-(5|-7|+3)=|-8|+6-2
|x-3|+7
12-3|x-1|=6
cac ban giup minh nhe nho cac buoc tinh ro rang nha minh se like cho
\(5+x-3=5-\left(x+4\right)\)
\(5+x-3=5-x-4\)
\(x+x=5-4-5+3\)
\(2x=-1\)
\(x=\frac{-1}{2}\)
vay \(x=\frac{-1}{2}\)
\(x-\left(5.\left|-7\right|+3\right)=\left|-8\right|+6-2\)
\(x-\left(5.7+3\right)=8+6-2\)
\(x-38=12\)
\(x=12+38\)
\(x=50\)
vay \(x=50\)
\(\left|x-3\right|+7=0\)
\(\left|x-3\right|=-7\)( ko ton tai)
\(12-3\left|x-1\right|=6\)
\(3\left|x-1\right|=6\)
\(\left|x-1\right|=2\)
\(\Rightarrow\orbr{\begin{cases}x-1=2\\x-1=-2\end{cases}}\Rightarrow\orbr{\begin{cases}x=3\\x=-1\end{cases}}\)
vay \(\orbr{\begin{cases}x=3\\x=-1\end{cases}}\)
Tim x biet :
B) 19 . ( x - 7 ) = 19
dau cham thay cho dau nhan do nha cac ban mong cac ban giai nhanh va dung cho mik nha thank cac ban nhiu
19 . ( x - 7 ) = 19
x - 7 = 19 : 19
x - 7 = 1
x = 1+ 7
x = 8
tim so tu nhien n biet:
4^11x25^11<5^n<20^12x5^12
2^n+3 x 2^n=144
1/9.3^3.3^n=3^7
1/2 x 2^n+4x2^n=9x2^5
giai chi tiet giup minh nha . Thanks cac ban nhiu :)))))
1Tính
-4/25 × 11/13 + -2/25 × 7/15 - 18/25
2Tim x
45% của x bằng 3/10
tinh
1 x 3 x 5 x 7 x ... x 57 x 59 = ...
cac ban giai ho minh nha
hai so duong x,y thoa man x.y=20 va x/4=y/5 co gia tri lan luot la
cach lam nha cac ban
-2×(-x-5)+18=20-3×(x+4) Tim x€Z cac ban giang ming bai nay voi
cac ban oi cho nhung biet cau nay nha
[x--3]7=450+90
[x+7]8=334-78
x-7=256+89
785 x 489 = ?
GIUP MINH NHA. KET BAN VOI MINH NUA NHA. CHUC CAC BAN NU 20/10 VUI VE ^_^
785 x 489 = 383 865.