Question

Calculati (va rog cat mai rapid si sa nu fie rezolvate direct!! ).... PS: am neboie dimineata de ele va rog cat mai repede..!!
a) 21x-3-7(3x-1)
b) 5x-1-(15x-9):3
c) 3x(4x-3)-4x(3x-4)
d) (4x+3)(5x-4)-10x(2x-1)+12
e) (8x-4):4-(12x-3):3
f ) (4x-2)(6x+5)-(8x+1)(3x-10)
g) -9x+10-2{7x-3[-31(1-x)]}

Answer 1

a) =21x-3-21x+7=4

b) =5x-1-3(5x-3):3=se simplif impartirea cu 3=5x-1-5x+3=2

c) =12x²-9-12x²+16=7

d) =20x²-16+15x-12-20x²+10x+12=25x-16

e) =4(2x-1):4-3(4x-1):3=2x-1-4x+1=-2x

f) =24x²+20x-12x-10-24x²+80x-3x+10=85x

g) =-9x+10-2{7x-3(-31+31x)]
=-9x+10-2(7x+93-93x)
=-9x+10-14x-186+186x
=163x-176