tim x:
x.67+x.33=1290
tim x:x^5+x^4+x+1=0
giúp mik
\(x^5+x^4+x+1=0\)
\(\Leftrightarrow x+1=0\)
hay x=-1
tim x:x4=x
tim x
x:x X 15 - 3,7 = 2,3
x:x*15-3,7=2,3
x:2*15-3,7=2,3
x:2*15=2,3+3,7
x:2*15=6
x:2=6:15
x*2=0,4
x=0,4:2
x=0,2
tìm x:
x : 33 = \(\dfrac{9}{66}\) \(\dfrac{4}{5}\) x \(x\) = \(\dfrac{10}{11}\) :\(\dfrac{3}{4}\)
\(x:33=\dfrac{9}{66}\)
\(x=\dfrac{9}{66}\times33\)
\(x=\dfrac{9}{2}\)
\(\dfrac{4}{5}\times x=\dfrac{10}{11}:\dfrac{3}{4}\)
\(\dfrac{4}{5}\times x=\dfrac{40}{33}\)
\(x=\dfrac{40}{33}:\dfrac{4}{5}\)
\(x=\dfrac{50}{33}\)
#Đạt Đang Bận Thở
(100 +67) x 67 +( 200 -33) x 33
(100 + 67) x 67 + (200 - 33) x 33
= 167 x 67 + 167 x 33
= 167 x ( 67 +33)
= 167 x 100
= 16700
2. tính nhanh:
a) (100 + 67 ) x 67 + (200 - 33 ) x 33
Tính nhanh
(100 + 67) x 67 + (200 – 33) x 33
\(\left(100+67\right).67+\left(200-33\right).33\)
\(=167.67+167.33\)
\(=167.\left(67+33\right)=167.100=16700\)
ĐỀ BẠN TỰ GHI À NHA
=167x67+167x33
=167x(67+33)
=167x100
=16700
(100 + 67) x 67 + (200 – 33) x 33
=167x67+167x33
=167x(67+33)
=167x100
=16700
tim so nguyen x de cac phan so sau la so nguyen a) 13:x-1 b)x+3:x-2 c) 2.x:x+2
a) Để \(\frac{13}{x-1}\)là số nguyên thì 13 chia hết cho x-1
=> x-1 thuộc Ư (13)={-13;-1;1;13}
Ta có bảng
x-1 | -13 | -1 | 1 | 13 |
x | -12 | 0 | 2 | 14 |
b) Có x+3=x-2+5
=> 5 chia hết cho x-2
=> x-2 thuộc Ư(5)={-5;-1;1;5}
Ta có bảng
x-2 | -5 | -1 | 1 | 5 |
x | -3 | 1 | 3 | 7 |
c) 2x=2(x+2)-4
=> 4 chia hết cho x+2 hay x+2 thuộc Ư (4)={-4;-2;-1;1;2;4}
Ta có bảng
x+2 | -4 | -2 | -1 | 1 | 2 | 4 |
x | -6 | -4 | -3 | -1 | 0 | 2 |
Tim x
1) x - 26 = 95 2) 79 - x = 65 3) 119 - x = 97
4) (x - 67) - 23 = 10 5) ( x - 97 ) - 68 = 35 6) 135 - (x + 43) = 67
7) 289 - (x+167) = 65 8) 167 - ( x - 33 ) = 133 9) 465 - (x - 57) = 364
1)x - 26 =95 2)79 - x = 65 3)119 - x =97 4) (x - 67) -23 =10
x =95+26 x=79-65 x =119-97 x - 67 =10+23 =33
x =121 x=14 x =22 x =33+67
x =100