tinh : 1+2-3+4+5+6+7+8+9+...+97+98-99
tim x: 1-|x+1|=-7
Tìm x:
172 * x^2 - 7^9 : 98^3= 2^-3
1.Tim x biết x - 252525 * 3/2 + 3/5 - 3/7 / 3/2 + 1/5 - 1/7 =7/8
2. 9/8 - 9/8 * 2/5 + 2/6 - 2/7 / 3/5 + 3/6 - 3/7 - X = 1
Bai 1 tim x
2/3 x -3/2 x=5/12
72-3/x+1/=9
7/9 : (2+3/4 x)+5/9=23/27
Tim x
1/ | x+15| =7
2/ 2. | x-5| =8
3/ 3. |2x-7|= 9
tim x
x.2 4/9 = 4 2/5 _1 4/7
x:10 6/5 = 4 6/5 + 9 7/5
x: 3 10/3 = 9 1/9 - 5 1/9
tìm x biết:
c, 172 x2 - 79 : 983 = 2-3
tim x
2/5+2/5.(3.x-3,7)=-53/10
7/9 / (2+3/4.x)+5/9=23/27
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