Odpowiedź:
4+x = (20 -x) - (12 +2x)
4+x = 20 - x - 12 - 2x
4+x = 8 - 3x
x+3x = 8 - 4
4x = 4 /:4
x = 1
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Odpowiedź:
4+x = (20 -x) - (12 +2x)
4+x = 20 - x - 12 - 2x
4+x = 8 - 3x
x+3x = 8 - 4
4x = 4 /:4
x = 1