Đề bài yêu cầu gì vậy bạn?
\(x^9+15x^3\)
\(=x^3\cdot x^6+15\cdot x^3\)
\(=x^3\left(x^6+15\right)\)
Tìm x, biết:
a) 23x = 69;
b) 5.|x| = 25.
c) 15x + 3 = 48;
d) 3.|x| + 2 = 38 + 9.
Tìm x, biết: a) 23x = 69; b) 5.|x| = 25. c) 15x + 3 = 48; d) 3.|x| + 2 = 38 + 9
Tìm x
a, x+1/5=-4/9
b, 2- (x+3/7)=9/-21
c, -2/5 + 5/3(3/2-4/15x)=-7/6
Tìm x:
a, -1/3. (15x-9)+ 2/7. (-x-34)= 1- 3/4. (-16x+4)
b, -1/3. (x-5)+ 1/2. (2x-1/3) = -4.(x+1/2) -7
c, 3.(-2x+7) -6. (1/2x) =1.(x-3)
Tìm x
a . ( 17x + 23 ) : 12 = 9
b . 345 - ( 15x + 63 ) = 102
c . ( 11x - 23 ) . 73 = 5 . 75
1. x - 8 +32= 68
2. x +8+32=68
3. 98-x +34=43
4. 98+x-34=43
5. x :5:4=800
6. 18+x=384:8
7. (84,6-2 x x):3,02= 5,1
8. x x5= 120:6
9. (15x 24-x) :0,25= 100:0,25
tìm số tự nhiên n biết rằng : 415x 915< 2nx 3n< 1816x 216
x+2 x+3 x +...+15x=1200
15x - 57 = 314: 39
50-[70:(x-1)]=15
(52 +23). x + 42=72
2x: 25=1
18-(x-2)5=2.32
