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5+x=24-x-19+2x
x+x-2x=24-19-5
0=0
b)9x-4x+(4+x)=2(x-1)
9x-4x+4+x=2x-2
6x-2x=-2-4
4x=-6/:4
x=6/4
x=1,5
c)3y+5=4(9+0,75y)
3y+5=36+3y
0=31 sprzeczność
d)x/2-x/4=7-x/3 /*12
6x-3x=84-4x
3x+4x=84
7x=84 /:7
x=12
2(x+1)=1/2x-4
2x+2-1/2x=-4
1,5x=-4-2
1,5x=-6 /:1,5
x=4