a)-3x=2x-10 -3x-2x=10 -5x=10 /:-5 x=-2 b)2x-2=7 2x=7+2 2x=9 /:2 x=4,5 c)10=4-2x 2x=4-10 2x=-6 /:2 x=-3 d)-(2x-1)=4 -2x+1=4 -2x=4-1 -2x=3 /:-2 x=-3/2 x=-1i1/2 e)2(x+1)=x 2x+2=x 2x-x=-2 x=-2 f)2t-(3t+1)=6 2t-3t-1=6 -t=6+1 /*(-1) t=-7 g)-(4+x)=2(3-x) -4-x=6-2x -x+2x=6+4 x=10 h)3(y+6)=2(y+9) 3y+18=2y+18 3y-2y=18-18 y=0 i)(x-7)-2(3x+5)=3 x-7-6x-10=3 x-6x=3+10+7 -5x=13 /:(-5) x=-13/5 x=-2i3/5
a)-3x=2x-10 2x+3x=10 5x=10 /5 x=5 b)2x-2=7-x 2x+x=7+2 3x=9 /3 x=3 c)10=4-2x 10-4=-2x 6=-2x /-2 x=-3 d)-(2x-1)=4 -2x+1=4 -2x=4-1 -2x=3 /-2 x=-1,5 e)2(x+1)=x 2x+1=x 2x-x=-1 x=-1 f)nie wiem g) -(4+x)=2(3-x) -4-x=-6-2x 4+x=6+2x 4-6=2x-x -2=x x=-2 h) 3(y+6)-y=2(y+9) 3y+18-y=2y+18 3y-y-2y=18-18 0=0 i)(x-7)-2(3x+5)=3 x-7-6x-10=3 -5x-17=3 -5x=20 /-5 x=4