a
\(1312:\left(3x-19\right)=32\)
\(3x-19=1312:32\)
\(3x-19=41\)
\(3x=41+19\)
\(3x=60\)
\(x=60:3\)
\(x=20\)
b
\(x+\frac{5}{6}=\frac{11}{2}\)
\(x=\frac{11}{2}-\frac{5}{6}\)
\(x=\frac{14}{3}\)
1312 : (3x - 19) = 32
=> 3x - 19 = 1312 : 32
=> 3x - 19 = 1312 : 32
=> 3x - 19 = 41
=> 3x = 41 + 19
=> 3x = 60
=> x = 60 : 3
=> x = 20
\(x+\frac{5}{6}=\frac{11}{2}\)
\(\Rightarrow x=\frac{11}{2}-\frac{5}{6}\)
\(\Rightarrow x=\frac{14}{3}\)
Tìm giá trị các đa thức sau :
1. \(E=5x^7+10x^6-20x^5-35x^4+20x^3+32x+2007\) biết \(x^6+2x^5-4x^4-7x^3+4x^2-x+8=0\)
2.\(F=21x^8-24x^6+9x^5+3x^3+6x^2+2006\)biết \(7x^6-8x^4+3x^3+x+2=0\)
3.\(G=3x^4+5x^2y^2+2y^4+2x^2\)biết \(x^2+y^2=0\)
4.\(H=7x^5+8x^3y^2+35x^3y^3+40xy^5+19\)biết \(x=19\)
tìm x biết
1) x=-1/2 + 3/4 2) x - 1/5 = 2/11 3) x - 5/6 = 16/42 + -8/56
4) x/5 = 5/6 + -19/30 5) |x| - 1/4 = 6/18 6)x = -1/2 +3/4
7) x/15 = 3/5 + -2/3 8)11/8 + 13/6 = 85/x 9) x - 7/8 = 13/12
10) x - -6/15 = 4/27 11) -\(\dfrac{-6}{12}\)+ x = 9/48 12) x - 4/6 = 5/25 + -7/15
tìm x, biết:
A, x2 + 5x + 6 = 3x 34 + 2x -9
B, 2\(\sqrt{x}\)+ 8x + 5 = 5x - 4 + 3x + 19
C, 5\(\sqrt{x}\)+ 2x - 8 = 5x + 4 - 3x - 19
Tìm x, biết rằng: a) 2x = 16 b) 3x+1 = 9xc) 23x+2 = 4x+5d) 32x-1 = 243
Tìm GTNN
A= |x - 15/19|
B=11-|2/3x + 1/2|
19/21<x/y<7/6 3x-2y=5 Tìm x va y
cho đơn thức: P(x)= 2+5x-3x+4x-32x-5
câu này dễ đúng không????
Tìm x :
a) | x +5 | + | 3 - x | = 8
b) | 3x - 5 | + | 3x +1 | = 6
c) | x - 3 | + | 2x + 5 | = 11
d) | x +1 | + | 2x - 3 | = | 3x - 2 |
e) | x - 3 | + | 5 - x | + 2|x-4| = 2
Tìm x biết :
a, 4.(18 - 5x) - 12.(3x - 7) = 15.(2x - 16) - 6(x + 14)
b, 5.(3x + 5) - 4.(2x - 3) = 5x + 3.(2x + 12) + 1
c, 2.(5x - 8) - 3.(4x - 5) = 4.(3x - 4) + 11
d, (3x + 2)(2x + 9) - (x + 2)(6x + 1) = (x + 1) - (x - 6)
e, (8x - 3)(3x + 2) - (4x + 7)(x + 4)= (2x + 1)(5x - 1) - 33
