Ответ:
(b+4)/2-2=b/2
b/2+4/2-2=b/2
b/2+2-2=b/2
b/2=b/2
b= R (любое рациональное число)
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Ответ:
(b+4)/2-2=b/2
b/2+4/2-2=b/2
b/2+2-2=b/2
b/2=b/2
b= R (любое рациональное число)