-( 2x + 586 ) + 186 = -5 - 3x
-2x - 586 + 186 = -5 - 3x
-2x + 3x - ( 586 - 186 ) = -5
x - 400 = -5
x = -5 + 400
x = 395
-( 2x + 586 ) + 186 = -5 - 3x
-2x - 586 + 186 = - 5 -3x
-2x + 3x = -5 - 186 + 586
x = 395
-( 2x + 586 ) + 186 = -5 - 3x
-2x - 586 + 186 = -5 - 3x
-2x + 3x - ( 586 - 186 ) = -5
x - 400 = -5
x = -5 + 400
x = 395
-( 2x + 586 ) + 186 = -5 - 3x
-2x - 586 + 186 = - 5 -3x
-2x + 3x = -5 - 186 + 586
x = 395
120 + (3x + 34) . 2 - (7 + x) = 186
Bài 1: Tính hợp lí
a, -1982 - { 31 - [ 1982 - ( 28-31) ] }
b, -19 . ( 71 -131 ) - 131 . ( 71-19)
c, 54 . ( 186 -12 ) - 186. ( 54+12)
Bài 2: Tìm x, biết
a, -3x -1=8
b, -4.( x-1) -1 = 13-3 ( x+2)
c, ( x-2) -13 = 16+ ( 2x+1)
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rut gon
a,3x(2x-7)-3x(4x-5)
b,(-7x+8)(-2x+3)-7x(2x-4)
c,(2x-3)(3x2-2x+4)-(2x-3)(3x+4)
d,(-2+7)(3x-6)-(4x-5)(2x-6)
-3(2x-1)-5(3x+2)=14
-4(3x+5)+7(-2x-3)=-11
2(-3x+4)+3(x-5)=2(x+6)+1
-5(3x-1)-4(-2x+3)=0
-7(2x-1)+5(3x-4)=-3(x-5)
|x-3|=0
3|x+2|-5=16 cac ban lam nhanh nhe
tim x
-2x(6x-2)+3x(4x-7)=8
(7x-2)(2x+3)-(3x-5)(4x+6)=2x2-5
+(-2x+3)-6x(3x-4)=-22x2+7x
tìm x thuộc z
1)(-3x+2)-(5-3x)=-3
2) 3+x-(3x-1)=6-2x
3) (x-5).(3x+4)=0
4) 7x.(2x-1)=0
5) (3x-1).2x=0
giúp mik với mai mik đi học rùi :((
a) x + 7 ⋮ x + 2
b) 2x + 5 ⋮ x + 1
c) 3x - 2 ⋮ x + 3
d) 12x + 1 ⋮ 3x + 2
e) x2 + 3x + 5 ⋮ x + 3
f) X2 - 2x + 3 ⋮ x + 2
Tìm x biết :
a)(3x-3)+(x-2)=(2x-2)-(x-1).
b)(4x-3)+(3x+5)=3x-2.
c)(6x-8)-5(x+2)=2x-12.
d)(9x-2)-4(2x+5)=-12.
Tìm x biết:
a)(2x-3)-(x-5)=(x+7)-(x+2)
b)(7x-5)-(6x+4)+(2x+3)-(2x+1)
c)(9x-3)-(8x+5)=(3x+2)
d)(x+7)-(2x+3)=(3x+5)-(2x+4)