a) 9-3x + 2x = 8 - 2x - 2 9 - 5x = 6 - 2x 9 - 6 = 2x + 5x 3 = 7x3 x = 2.33 b) 4 - 15 - 5x = 3x - 2x -11 - 5x = x -11 = x + 5x -11 = 6x azy - 11 x = -66 c) 4x + 15 x + 30 = 4 + 2x - 4 19x + 30 = 1 + 2x 30 - 1 = 2x - 19x 29 = -17x azy 29 x = -493 d) 7x - 2x = 2x - 2 + 1 5x = -1 - 2x 2x - 5x = -1 -3x = -1 azy - 3 x = 3
a)3(3-X)+2x=8-2(x-1) 9-3x+2x=8-2x+2 -3x+2x+2x=-9+8+2 x=1 Spr: 3(3-1)+2*1=8-2(1-1) 6+2=8-2*0 8=8 b)4-5(3-X)=-X-(3-2x) 4-15+5x=-x-3+2x 5x+x-2x=-4+15-3 4x=8|:4 x=2 Spr: 4-5(3-2)=-2-(3-2*2) 4-5=-2+1 -1=-1 C)4x+5-(3x+6)=2(2+x)-4 4x+5-3x-6=4+2x-4 4x-3x-2x=-5+6+4-4 -x=1|*(-1) x=-1 Spr: 4*(-1)+5-[3*(-1)+6]=2[2+(-1)-4 -4+5-(-3+6)=2-4 -4+5+3-6=2-4 -2=-2 D)x-(7+2x)=2(x-1)+1 x-7-2x=2x-2+1 x-2x-2x=7-2+1 -3x=6|:(-3) x=-2 Spr -2-[7+2*(-2)]=2[-2-1]+1 -2-[7-4]=-6+1 -2-3=-5 -5=-5
a)3(3-X)+2x=8-2(x-1) 9-3x+2x-8+2x-2=0 x= 1 spr. 3(3-1) + 2*1= 8-2(1-1) 6+2= 8 8=8 L=P b)4-5(3-X)=-X-(3-2x) 4-15+5x= -x-3+2x 4x= 8//4 x=2 spr. 4-5(3-2)= -2-(3-2*2) 4-5= -2+1 -1=-1 L=P C)4x+5-(3x+6)=2(2+x)-4 4x+5-3x-6= 4+2x-4 -x= 1//(-1) x= -1 spr.4*(-1)+5-(3*(-1)+6)=2(2+(-1))-4 -4+5-3=2-4 -2=-2 L=P D)x-(7+2x)=2(x-1)+1 x-7-2x= 2x-2+1 -3x=6//(-3) x= -2 spr. -2-(7+2*(-2))=2((-2)-1)+1 -2-3=-6+1 -5=-5 L=P 6-19= 10+1
