Question

Rozwiąż równanie:
1)
2) 3x=x-(1-(x-3))

3) 5x-(2x+(3-x))=11

4) 1-(x-(x-(x-1))) =0

Answer 1

1) 6-2(2x-1/2)=4x-2(3/4-3x)
6-4x+1=4x-3/2+6x
-14x = -3/2-7
-14x = -1 1/2-7
-14x = -8 1/2 :(-14)
x=-17/2 * (-1/14)
x=17/28

2) 3x=x-(1-(x-3))
3x=x-(1-x+3)
3x=x-1+x-3
x=-4

3) 5x-(2x+(3-x))=11
5x-(2x+3-x)=11
5x-2x-3+x=11
4x=14/:4
x=14/4=3 1/2

4) 1-(x-(x-(x-1))) =0
1-(x-(x-x+1)) =0
1-(-x-x+x-1)=0
1+x+x-x+1=0
x=-2