1. 2x+5=2(x+6) 2. (1-4x)(1-3x)=6x(2x-1) 3. (7x+1(3x-1)-21x^=3 help meeee! !
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Ответы на вопрос:
1) 2x+5 = 2x+12 2x-2x =12-5 0 7 2) (1-4x)(1-3x) = 6x(2x-1) 1-3x-4x+12x^{2} = 12x^{2} - 6x -3x-4x+6x= -1 -x = -1 x = 1 3) (7x+1)(3x-1)-21x^2=3 21x^2-7x+3x-1-21x^2=3 -4x-1=3 -4x = 3+1 -4x=4 x= -1
1. 2х+5=2х+12 0≠7 2. 1-3х-4х+12х^2=12х^2-6х 1-7х=-6х 6х=6х х=1 3. 21х^2-7х+3х-1-21х^2=3 -4х-1=3 -4х=4 х=-1
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