\(7x-15=27\\ 7x=27+15\\ 7x=42\\ x=42:7\\ x=6\)
\(7x-15=27\\ 7x=27+15\\ 7x=42\\ x=42:7\\ x=6\)
tìm x biết [ 15 - 7x ] .3 - 9 = 15
1. 6x+x=5^11:5^9+3
2. 7x-x=5^21:5^19+3x4-1
3. 7x-2x=6^17:6^15+44:11
a) -2x - (-17)= 9 b) 11 + (15 – x) = 1
c) 53 – 7x = 57 : 55 |
b) 11 + (15 – x) = 1
d) 29 +9.x2 = 110
e) (2x-4).(3-x) = 0
g) 2x + 1 chia hết cho x -2
7x - 2x = 6^17 : 6^15 + 44 : 11
9^x-1 = 9
| x - 5 | = 7 - ( - 3 )
| x - 5 | = | - 7 |
| x | - 5 = 3
15 - 2|x| = 13
| x - 2 | = 0
Bài 1:Tìm x
a) 5x+x=39-3^11:3^9
b) 7x-x=5^21:5^19+3.2^2-7^0
c) 7x-2x =6^17:6^15+44:11
Tình hợp lý nếu có thể :
-5/2x 2/11+-5/7x 9/11+15/7
Tìm x biết:
(2x-15)mũ 5=(2x-15)mũ 3
a) -2x - (-17)= 9 b) 11 + (15 – x) = 1
c) 53 – 7x = 57 : 55 e) | d) 29 +9.x2 = 110 g) 2x + 1 chia hết cho x -2 |
(2 4) (3 ) 0 x x - - =
a) -2x - (-17)= 9 b) 11 + (15 – x) = 1
c) 53 – 7x = 57 : 55 | d) 29 +9.x2 = 110 |
e) (2x-4).(3-x) = 0
g) 2x + 1 chia hết cho x -2 |
(7x-15).(x1-1\9)=0
7x - x = 521 : 519 + 3 . 22 - 70
7x - 2x = 617 : 615 + 44 : 11
3x = 9
2x = 16
2x : 25 = 1
9x - 1 = 9
39 : 3x = 27