a ) 7. ( x - 9 ) - 5( 6 - x ) = -6x + 11x
( 7x - 63 ) - ( 30 - 5x ) = 5x
7x - 63 - 30 + 5x = 5x
=> 7x - 63 - 30 = 0
=> 7x = 0 + 30 + 63
=> 7x = 93
=> x = 93/7
b ) 7 . ( x - 3 ) - 5 ( 3 - x ) = 11 - 5x
( 7x - 21 ) - ( 15 - 5x ) = 11 - 5x
7x - 21 - 15 + 5x = 11 - 5x
7x - ( 21 + 15 ) + 5x + 5x = 11
( 5x + 5x + 7x ) - 36 = 11
17x - 36 = 11
17x = 11 + 36
17x = 47
x = 47/17
Tìm x
a) ( x + 7 ) - 25 = 135x + 2x =6^5 - 5^0
b) 5x + x = 150 : 2 + 3
c) 6x + x = 5^11 : 5^9 + 3^1
d) 5x + 3x = 3^6 : 3^3 . 4 + 12
1)5x+2(x+1/2)=7
2)8x-3(x+2)=9
3)5(x-2)+3(x-1)=19
4)7(x-3)-2x-5=11
5)6x+3-2(x-5)=30
6)8(x-1/8)-5(x-1/5)=10
7)13x-5-2(x+3)=1
8)4(x-2)-2(x-1)=12
9)6x-13-2-(x×5)=7
10)7(x-5)-3(x+5)=30
tìm x biết
-(-x)-(-9)=-(3-6-9+3)
17-x=7-6x
5x-7=-21-2x
7(x-3)-5(3-x)=11x-5
giúp mình trong tối nay nha
a) 3 - 2 ( x - 3 ) = 3x + ( - 5 )
b) - 6 - ( 7 + x ) = - 2 - 5 - 2x
c) 8x - 7 = - 13 + 7x
d) - 6 ( x - 2 ) + 5x = 13 - 2x
e) - 5 - 6x = x - 5x + 3
Tìm x biết
a) 5x+2x=6^2-5^0
b)6x+x=5^11:5^9+3^1
c)5x+3x=3^6:3^3.4+12
5x + 2x =62 - 50
5x + x = 150 : 2+ 3
6x + x = 511 : 59 - 31
5x + 3x = 36 ; 33 .4 +12
4x + 2x = 68 - 219 : 2 16
5x + x = 39 - 311 : 39
7x - x = 521 : 519 + 3. 22 - 70
7x - 2x = 617 : 615 + 44 : 11
Tìm x :
a) 5x + 2x = 62 - 50
b) 5x + x = 150 : 2 + 3
c) 6x + x = 511 : 59 + 31
d) 5x + 3x = 36 : 33 x 4 + 12
e) 4x + 2x = 68 - 219 : 216
f) 5x + x = 39 - 311 : 39
g) 7x - x = 521 : 519 + 3 x 22 - 70
h) 7x - 2x = 617 : 615 + 44 : 11
Giúp mình nha ai nahnh mik tick
giúp mình giải bài toán.......
1)3x-6=5x+2
2)15-x=4x-5
3)x-15=6+4x
4)-12+x=5x-20
5)7x-4=20+3x
6)5x-7=-21-2x
7)x+15=20-4x
8)17-x=7-6x
9)-4|x-2|=-8
10)-7|x+4|=2.(-7)
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
