Matematică
jhonsan79
1

a)  21x-3-7(3x-1)  b)  5x-1-(15x-9)÷3 c)   3x(4x-3)-4x(3x-4) d)   (8x-4)÷4-(12x-3)÷3 e)   (4x+3)(5x-4)-10x(2x-1)+12

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(1) Răspunsuri
nicolaeosain

a)  ... =21x-3-21x+7=4 ;         b)  ... =5x-1- (5x-3)*3:3=5x-1-5x+3=2 ; c)  ... =12x-9 -12x+16=7 ;      d)  ... =(2x-1)*4:4-(4x-1)*3:3=2x-1-4x+1=-2x ; e)  ... =20x²+15x-16x-12 - 20x + 10 + 12 = 20x²-21x+10 ;

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