a 2(x+3)=10 2x+6=10 2x=4 x=2 b 3(x-1) + 2+=8 3x-3+2=8 3x=9 x=3 c 2(13-x)-9=1 26-2x-9=1 -2x+17=1 -2x=-16 2x=16 x=8 d 3( 1 - x)+2=-7 3-3x+2=-7 -3x+5=-7 -3x=-12 3x=12 x=4 e 3(x+3)=2(x+4)+x+1 3x+9=2x+8+x+1 3x-2x-x=9-9 0≠0 f 4( 3x+2)+5(2x+3)=-(2x+13) 12x+8+10x+15=-2x-13 22x+23=-2x-13 20x=-36 x=-1,8 g 4(x-2)-2(x-4=5(x+1)-3x 4x-8-2x+8=5x+5-3x 2x=2x+5 0≠5 h 2 (x-4)=2(2x-1)+6(x+1) 2x-8=4x-2+6x+6 2x=10x+4+8 2x-10x=12 -8x=12 8x=-12 x=-1,5
a 2(x+3)=10 2x+6=10 2x=10-6 2x=4 x=2 b 3(x-1) + 2+=8 3x-3+2=8 3x=8+3-2 3x=9 x=3 c 2(13-x)-9=1 26-2x-9=1 -2x=1-26+9 -2x=-16 x=8 d 3( 1 - x)+2=-7 3-3x+2=-7 -3x=-7-3-2 -3x=-12 x=4 e 3(x+3)=2(x+4)+x+1 3x+9=2x+8+x+1 3x-2x-x=8+1-9 0=0 f 4( 3x+2)+5(2x+3)=-(2x+13) 12x+8+10x+15=-2x-13 12x+10x+2x=-13-8-15 24x=-36 x=-1,5 g 4(x-2)-2(x-4=5(x+1)-3x 4x-8-2x+8=5x+5-3x 4x-2x-5x+3x=5+8-8 0≠5 h 2 (x-4)=2(2x-1)+6(x+1) 2x-8=4x-2+6x+6 2x-4x-6x=-2+6+8 -8x=12 x=-1,5
a) 2(x+3)=10 2x + 6 = 10 / -6 2x = 4 / :2 x = 2 b) 3(x-1) + 2=8 3x - 3 + 2 = 8 3x - 1 = 8 / +1 3x = 9 / :3 x = 3 c) 2(13-x)-9=1 26 - 2x - 9 = 1 17 - 2x = 1 / -17 -2x = -16 / :(-2) x = 8 d) 3( 1 - x)+2=-7 3 - 3x + 2 = -7 5 - 3x = -7 / -5 -3x = -12 / :(-3) x = 4 e) 3(x+3)=2(x+4)+x+1 3x + 9 = 2x + 8 + x + 1 3x + 9 = 3x + 9 / -9 3x = 3x / -3x 0=0 f) 4( 3x+2)+5(2x+3)=-(2x+13) 12x + 8 + 10x + 15 = -2x -13 22x + 23 = -2x -13 / +2x 24x + 23 = -13 / -23 24x = -36 / :24 x = -1,5 g) 4(x-2)-2(x-4)=5(x+1)-3x 4x - 8 - 2x + 8 = 5x + 5 - 3x 2x = 2x + 5 / -2x 0 = 5 (r.sprzeczne) h) 2(x-4)=2(2x-1)+6(x+1) 2x - 8 = 4x - 2 + 6x + 6 2x - 8 = 10x + 4 / +8 2x = 10x + 12 / -10x -8x = 12 / :(-8) x = -1,5
