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4(2 1/2a-1 1/4b)-3(2a-1 1/2b)-2(-1 1/4a-1 3/4b)
/ to kreska ułamkowa.
Jbc. to 1 gimanzjum
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4(2 1/2a-1 1/4b)-3(2a-1 1/2b)-2(-1 1/4a-1 3/4b)=
=10a-1b-6a+4,5b+2,5a+3,5b=
=6,5a+7b
4(2 1/2a-1 1/4b)-3(2a-1 1/2b)-2(-1 1/4a-1 3/4b)=4(5/2a-5/4b)-3(2a-3/2b)-2(-5/4a-7/4b)=20/2a-20/4b-6a+9/2b+10/4a+14/4b=10a-5b-6a+4i1/2b+2i1/2a+3i1/2b=6i1/2a+3b=6,5a+3b