rozwaiaz rownania:a)3x-2(x+1)=3+3xb)5(x-1)+2x=2(x+1)+8c)2(4-x)=5(x-1)-1d)2(x-1)-5=3(2x-3)-8xe)12x-(2x+1)=9

a)3x-2(x+1)=3+3x 3x-2x-2=3+3x 3x-2x-3x=3+2 -2x=5 /:(-2) x=-5/2   b)5(x-1)+2x=2(x+1)+8 5x-5+2x=2x+2+8 5x+2x-2x=2+8+5 5x=15 /:5 x=3   c)2(4-x)=5(x-1)-1 8-2x=5x-5-1 -2x-5x=-5-1-8 -7x=-14 /:(-7) x=2   d)2(x-1)-5=3(2x-3)-8x 2x-2-5=6x-9-8x 2x-6x+8x=-9+2+5 4x=-2 /:4 x=-0,5   e)12x-(2x+1)=9 12x-2x-1=9 12x-2x=9+1 10x=10 /:10 x=1   Mam nadzieję, że pomogłam:)  

a)3x-2(x+1)=3+3x 3x -2x -2 = 3+3x x-2 = 3+3x -2x=5 x=-2,5   b)5(x-1)+2x=2(x+1)+8 5x - 5 +2x = 2x+2 +8 7x -5= 2x+10 5x=15 x=3   c)2(4-x)=5(x-1)-1 8 -2x = 5x-5-1 8-2x = 5x -6 -7x =-14 x=2   d)2(x-1)-5=3(2x-3)-8x 2x-2 -5 = 6x -9-8x 2x -7 = -2x -9 4x = -2 x=-½   e)12x-(2x+1)=9 12x -2x -1 =9 10x =10 x=1

a) 3x-2(x+1)=3+3x 3x-2x-2=3+3x 1x-2=3+3x 1x-3x=2+3 -2x=5 / -2 x= 2 1/2   b) 5(x-1)+2x=2(x+1)+8 5x-5+2x=2x+2+8 7x-5=2x+10 7x-2x=10+5 5x=15 /5 x=3   c) 2(4-x)=5(x-1)-1 8-2x=5x-5-1 -2x-5x=-5-1-8 -7x=-14 /-7 x=2   d) 2(x-1)-5=3(2x-3)-8x 2x-2-5=6x-9-8x 2x-6x+8x=-9+2+5 4x=-2 /4 x= -1/2   e) 12x-(2x+1)=9 12x-2x-1=9 10x=10 /10 x= 1