Ta có:
\(-7x-3x\\ =\left(-7-3\right)x\\ =-10x\)
Vậy \(-7x-3x=-10x\)
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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
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)
Tìm x thuộc Z,biết:
a) 2x + 3x = -150
b) -24x + 7x = 3417
c) -3x + x = -842
d) -7x + 2x = -450
a, 3 - (7x - 6 ) - ( -4x + 2 ) = - ( -4 - 3x)
b, 4x + ( -8x + 3 ) = - (-7x +6 ) - 5 x
c, 6 - ( -4 -3x ) - ( 2 - 5x ) = 7 - ( 6x - 1 )
x+2x+3x+3x+4x+5x+6x+7x+8x+9x+10x=-165.tim x
3x-5=-7x-15
3x-35=-14+7x
2x + 3x^2 + 4x^2 + 7x
Tìm x , biết :
(3x+1)4x . (3x+1)3x =197x