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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
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 .. :)))
^_^