a)3(x+1)=2(2x-1) 3x+3=4x-2 3x-4x=-2-3 -x=-5 /:(-) x=5 b)3(2x-1)-2(4x+3)=7-4(x+1) 6x-3-8x-6=7-4x-4 6x-8x+4x=7-4+6+3 2x=12 /:2 x=6 c)x/4-2x/5=-3 /*20 5*x-4*2x=(-3)*20 5x-8x=-60 -3x=-60 /:(-3) x=2 d)2x+1/3+5-x/4=1-3x+2/6 /*12 24x+4+60-3x=12-36x+4 24x-3x+36x=12+4-60-4 57x=-48 /:57 x=-48/57
a) 3(x+1)=2(2x-1) 3x+3=4x-2 2+3=4x-3x 5=x spr: 3*5+3*1=2*(2*5)-2*1 15+3=20-2 18=18 L=P b) 3(2x-1)-2(4x+3)=7-4(x+1) 6x-3-8x-6=7-4x-4 -2x-9=3-4x -2x+4x=3+9 2x=12/:2 x=6 spr: 3*(2*6)-3*1-2*(4*6)-2*3=7-4*6-4*1 36-3-48-6=7-24-4 36-57=7-28 -21=-21 L=P c) x/4-2x/5=-3 20*x/4-20*2x/5=20*-3 5*x-4*2x=-60 5x-8x=-60 -3x=-60/:3 -x=-20/:-1 x=20 spr: 20/4-2*20/5=-3 5-40/5=-3 5-8=-3 -3=-3 L=P d) 2x+1/3+5-x/4=1-3x+2/6/*12 24x+4+60-3x=12-36x+4 21x+64=16-36x 21x+36x=-64+16 57x=-48/:57 x=-48/57 spr: 2*-48/57+1/3+5-48/57/4=1-3*48/57+2/6 -48/57=-48/57 L=P
