Odpowiedź:
a)3x-4= -9-4=-13
b)-7-3y=-7-12=-19
c)2x+3y-5=-82+6-5=-81
d)1/2a(a-1)=1/2a×9=5×9=45
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Odpowiedź:
a)3x-4= -9-4=-13
b)-7-3y=-7-12=-19
c)2x+3y-5=-82+6-5=-81
d)1/2a(a-1)=1/2a×9=5×9=45