5+x-(24-x)-(19-2x)=5+x-24+x-19+2x=4x-38 b)9x-4x +(4+x)=2(x-1) 9x-4x+4+x=2x-2 9x-4x+x-2x=-2-4 4x=-6 /:4 x=-1 1/2 c)3y +5 - 4(9+0,75y)=3y+5-36-3y=3y-3y+5-36=-31 d)x/2-x/4=7 - x/3 /*12 6x-3x=84-4x 6x-3x+4x=84 7x=84 /:7 x=12
b)9x-4x +(4+x)=2(x-1) 9x-4x+4+x=2x-2 9x-4x+x-2x=-6 4x=-6 / :4 x=-1.5
a) 5+x-(24-x)-(19-2x)= 5 + x - 24 + x - 19+ 2x = -38 + 4x = 4x - 38 b) 9x - 4x + (4+x) = 2(x-1) 9x - 4x + 4 + x = 2x - 2 9x - 4x + x - 2x = -2 - 4 4x = -6 /:4 x = - 6/4 x = -1 1/2 ( -1,5) c) 3y + 5 - 4(9+0,75y) = 3y + 5 - 36 - 3y = -31 d) x/2 - x/4 = 7 - x/3 x/2 - x/4 + x/3 = 7 /*12 6x - 3x + 4x = 84 7x = 84 / :7 x = 12 wszystko .. :))) ^_^
