zad.5 c) 2(x-3)-4(3+x)=-3(x+2)+2(2x-1) d) 6(x+1)+3(2-x)=2(2x-1)-(4-x) zad.6 c) -8(x+2)+3(x+5)=-2(2x+3)+4(2x-1) d) 6(4-x)+5(2x-5)=4(x-1)-3(4-x) zad.7 c) 4-5(3-x)=-x-(3-2x) d) x-(7-2x)=2(x-1)+1 prosze pomózcie ! ; )

zad.5 c) 2(x-3)-4(3+x)=-3(x+2)+2(2x-1) 2x-6-12-4x = -3x-6+4x-2 2x-4x+3x-4x = -6-2+6+12 -3x = 10 / : (-3) x = - ¹⁰/₃ x = -3 ⅓ d) 6(x+1)+3(2-x)=2(2x-1)-(4-x) 6x+6+6-3x = 4x-2-4+x 6x-3x-4x-x = -2-4-6-6 -2x = -18 / : (-2) x = 9 zad.6 c) -8(x+2)+3(x+5)=-2(2x+3)+4(2x-1) -8x-16+3x+15 = -4x-6+8x-4 -8x+3x+4x-8x = -6-4+16-15 -9x = -9 / : (-9) x = 1 d) 6(4-x)+5(2x-5)=4(x-1)-3(4-x) 24-6x+10x-25 = 4x-4-12+3x -6x+10x-4x-3x = -4-12-24+25 -3x = -15 / : (-3) x = 5

c) 2(x-3)-4(3+x)=-3(x+2)+2(2x-1) 2x-6-12-4x=-3x-6+4x-2 -2x-18=x-8 -3x=10 ]:(-3) x= - 3¹/₃ d) 6(x+1)+3(2-x)=2(2x-1)-(4-x) 6x+6+6-3x= 4x-2-4+x 3x+12= 5x-6 -2x=-18 ]:(-2) x=9 zad.6 c) -8(x+2)+3(x+5)=-2(2x+3)+4(2x-1) -8x-16+3x+15=-4x-6+8x-4 -5x-1=4x-10 -9x=-9 ]:(-9) x= 1 d) 6(4-x)+5(2x-5)=4(x-1)-3(4-x) 24-6x+10x-25=4x-4-12+3x 4x-1=7x-16 -3x=-15 ]:(-3) x=5

c) 2(x-3)-4(3+x)=-3(x+2)+2(2x-1)= 2x-6-12-4x=-3x-6+4x-2=2x-4x+3x-4x=6+12-6-2= -3x=10 / :(-3) x=-10/3 d) 6(x+1)+3(2-x)=2(2x-1)-(4-x)= 6x+6+6-3x=4x-2-4+x 6x-3x-4x-x=-12-6 -2x=-18 / :(-2) x=9 6.c) -8(x+2)+3(x+5)=-2(2x+3)+4(2x-1) -8x-16+3x+15=-4x-6+8x-4 -8x+3x+4x-8x=16-15-6-4 -9x=-9/ :(-9) x=1 d) 6(4-x)+5(2x-5)=4(x-1)-3(4-x) 24-6x+10x-25=4x-4-12+3x -6x+10x-4x-3x=-24+25-4-12 -3x=-15/ :(-3) x=5