4x - 3 = 3x+5 4x-3x=5+3 x=8 b)5x +2 = 7 - 3x 5x+3x= 7-2 8x = 6 |:8 x = 6/8 x=3/4 c)3(x - 1) = 0 3x-3=0 3x=3 |:3 x= 1 d)-6x(x +1) = 24 -6x² -6x = 24 -6x = 24 |:(-6) x = -4 e)-7(x - 2) = 3x - 1 -7x +14 = 3x-1 14+1= 3x+7x 15 = 10x |:10 x= 15/10 x = 1 5/10 x = 1½ f)4(x - 1 ) = 6(1 + x) 4x-4=6+6x -4+6=6x-4x 2=2x |:2 x=1
a)4x - 3 = 3x+5 4x-3x=5+3 x=8 4*8-3=3*8+5 32-3=24+5 29=29 b)5x +2 = 7 - 3x 5x+3x=7-2 8x=5/:8 x=5/8 5*5/8+2=7-3*5/8 3 i 1/8+2=7- 1 i 7/8 5 i 1/8= 6 i 1/8 c)3(x - 1) = 0 3x-3=0 3x=3/:3 x=1 3(1-1)=0 3-3=0 d)-6x(x +1) = 24 -6x-6x=24 -12x=24/:(-12) x=-2 -6*-2(-2+1)=24 e)-7(x - 2) = 3x - 1 -7x+14=3x-1 -7x-3x=-1-14 -10x=-15/:(-10) x=15/10 = 3/2 = 1 i 1/2 -7*1,5+14=3*1,5-1 -10,5+14=4,5-1 3,5=3,5 lixcze na maxa;)) f)4(x - 1 ) = 6(1 + x) 4x-4=6+6x 4x-6x=6+4 -2x=10/:(-2) x=-5 4(-5-1)=6(1-5) -20-4=6-30 -24=-24
a)4x - 3 = 3x+5 4x - 3x= 5+3 x= 8 spr 4* - 3= 3*8+5 b)5x +2 = 7 - 3x 5x + 3x=7-2 8x=5 x=5/8 spr. 5*5/8 +2= 7-3*5/8 c)3(x - 1) = 0 3x - 3=0 3x= 3 x=1 spr. 3(1-1)= 0 d)-6x(x +1) = 24 -6x² - 6x -24=0 /: (-6) x² + x + 4=0 Δ= 1- 4*1*4 = -15 brak rozw e)-7(x - 2) = 3x - 1 -7x+14=3x-1 -10x=-15 / (-10) x=3/2 sppr. -7(3/2 - 2)=3 * 3/2 -1 f)4(x - 1 ) = 6(1 + x) 4x-4=6+6x -2x=10/(-2) x=-5 spr. 4(-5-1)= 6(1-5)
