Explicación paso a paso:
1. x - 3 = 25
x = 25 + 3
x = 28
2. x + 9 = -234
x = -234 - 9
x = -243
3. x - 5 = -9
x = -9 + 5
x = -4
4. x - 23 = -78
x = -78 + 23
x = -55
5. -14 - x = 20
-14 - 20 = x
-34 = x
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Explicación paso a paso:
1. x - 3 = 25
x = 25 + 3
x = 28
2. x + 9 = -234
x = -234 - 9
x = -243
3. x - 5 = -9
x = -9 + 5
x = -4
4. x - 23 = -78
x = -78 + 23
x = -55
5. -14 - x = 20
-14 - 20 = x
-34 = x