Prosiłbym o te pare zadań z matematyki:
x - 13 = -2
-2x = 1/2
3x = 2x + 5
1/4x = 0,4
x = 6 - x
-1/3x = 2/3
Prosiłbym też żeby te zadania miały tylko rozwiązanie takie
x =
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X - 13 = - 2
X = -2 +13
X = 11
-2X = 1/2 / :(-2)
X = - 1/4
3X = 2X +5
3X -2X = 5
X = 5
1/4 X =0,4 /:1/4
X = 0,4 * 4
X = 1,6
X = 6-X
X+X = 6
2X = 6 /:2
X=3
-1/3X = 2/3 / :(-1/3)
X = -2