\(7x-13=3^2.2^2\)
\(7x-13=9.4\)
\(7x-13=36\)
\(7x=49\)
\(x=7\)
\(7x-13=3^2.2^2\)
\(7x-13=9.4\)
\(7x-13=36\)
\(7x=49\)
\(x=7\)
32.22-32.19
24 . 5-(131-(13-4)2 )
100:(250:(450-(4.53-22.25)))
( là ngoặc nhọn
( là ngoặc vuông
(là ngoặc tròn
7/13 x 7/15 - 5/12 x 7/13 + 7/13 x 8/15 = ?
1. -2/9 x 15/17 + -2/9 x 2/17
2. -5/3 x 6/5 + -7/9 x 3/10
3. 15/20 x 7/5 + -9/7 x -6/4
4.-25/13 x 5/19 + -25/13 x 14/19
5 -7/13 x 13/5 + -9/7 x 5/3
6. 27/35 x 5/9 - 2/7 x -7/5
7. 10/13 x 13/5 + {-9/5} x 10/3
8. 100/27 x 9/20 + 40% x 5/3
9. 1,5 x 5/12 + 1/4 x 3/4
10. 2 1/2 x 7/5 + {-9/10} x 2/3
11. X + 45% = 2 1/2 -5/3
12. 80% + X = -5/2 + 3/4
13. 4/25 - X =-5/2 + -3/10
1. -2/9 x 15/17 + -2/9 x 2/17
2. -5/3 x 6/5 + -7/9 x 3/10
3. 15/20 x 7/5 + -9/7 x -6/4
4.-25/13 x 5/19 + -25/13 x 14/19
5 -7/13 x 13/5 + -9/7 x 5/3
-5/7 x 3/13 - 5/7 x 10/13 + 12/7
-3/7 x 15/13 - 3/7 x 11/13 - 3/7
giúp mình với nhé
X\1×4 + x\4×7 + x\7×10 + x\10×13 + x\13×16 = 5\2
Tính giá trị biểu thức sau một cách hợp lí
A = 6/19 x -7/11 + 6/19 x -4/11 + -13/19 B = 5/7 x -4/13 + 5/7 x 7/13 - 5/13 x 3/7
giúp mình với
Tìm x
a)(x-5)^7=(x-5)^17
b)13/35-(13/21+x).7/12=7/10