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x+1-2x=2 /-1
-x=1 /*(-1)
x=-1
b) x+2(x-2)=1/2x+1
x+2x-4=1/2x+1
3x-4=1/2x +1 /+4
3x=1/2x+5 /*2
6x=x+10 /-x
5x=10 /:5
x=2
c) x+1/2-x/3=1 /*6
3(x+1)-2x=6
3x+3-2x=6
x+3=6 /-3
x=3
d) -4,5*(1,4 z -1) +3 =0,7z +1,2
-6,3z+4,5+3=0,7z+1,2 /-0,7z
-7z+7,5=1,2 /-7,5
-7z=-6,3 /:(-7)
z=0,9
a) x+1 / 2 - x = 1| razy2
2x+1-2x=2|-1
0=1
b) x + 2 ( x - 2) = 1/2x + 1
x+2x-4=1/2x+1|razy 2
2x+4X-8=x+2|+8
5x=10|;5
x=2
c) x +1 / 2 - x/3 = 1| razy 6
6x+3-2x=6|-3
4x=3|;4
x=3/4