a) 5x-3=7x+1/+3 5x=7x+4/-7x -2x=4/:-2 x=-2 b)10+4(1-x)=2x-6 10+4-4x=2x-6 14+4x=2x-6/+6 20+4x=2x/-4x -2x=20/:-2 x=-10 c) -3x+1=-2(x-3)-3 -3x+1=-2x+6-3 -3x+1=-2x+3/-1 -3x=-2x+2/+2x -x=2 x=-2 2. a)2x-1/2(3x-2)=7/4-x 2x-1/6x-4=7/4-x dalej nie wiem b) 3x-2(1-2x)=0,5(3x+1,5) 3x-2+4x=1,5x+0,75 7x-2=1,5x+0,75/+2 7x=1,5x+2,75/-1,5x 5,5x=2,75/:5,5 x=0,5
a) 5x-3=7x+1 5x - 7x = 1+3 -2x = 4 / :(-2) x = -2 b)10+4(1-x)=2x-6 10+4-4x = 2x-6 -4x-2x = -6-10-4 -6x = -20 /:(-6) x = 20/6 x = 3 1/3 c) -3x+1=-2(x-3)-3 -3x+1 = -2x+6-3 -3x+2x = 6-3-1 -x = 2 /:(-1) x = -2 2. a)2x-1/2(3x-2)=7/4-x 2x-1,5x+1 = 7/4-x 2x-1,5x+x = 7/4-4/4 1,5x = 0,75 /:1,5 x = 0,5 b) 3x-2(1-2x)=0,5(3x+1,5) 3x-2+4x = 1,5x+0,75 3x+4x-1,5x = 0,75+2 5,5x = 2,75 /:5,5 x = 0,5
