Rozwiąż równania
3 (1 - x ) - (1 - 2x) = 9
0 = 3 - (2x + 1)
3-3x-1+2x=9
2-x=9 /-2
-x=7 /*(-1)
x=-7
0=3-(2x+1)
0=3-2x-1
0=2-2x /-2
-2=-2x /*(-1)
2=2x / :2
1=x
1.
-3x+2x+2=9
-x=9-2
2.
3-2x-1=0
2-2x=0
-2x=-2
x=-2/-2
x=1
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3 (1 - x ) - (1 - 2x) = 9
3-3x-1+2x=9
2-x=9 /-2
-x=7 /*(-1)
x=-7
0=3-(2x+1)
0=3-2x-1
0=2-2x /-2
-2=-2x /*(-1)
2=2x / :2
1=x
1.
3 (1 - x ) - (1 - 2x) = 9
3-3x-1+2x=9
-3x+2x+2=9
-x=9-2
-x=7 /*(-1)
x=-7
2.
0 = 3 - (2x + 1)
3-2x-1=0
2-2x=0
-2x=-2
x=-2/-2
x=1