a)4a+90a=(4+90)*a=94a
б)86b-77b=(86-77)*b=9b
в)209m+m=(209+1)*m=210m
г)302n-n=(302-1)*n=301n
-----------------------------------------
a)24a+47a+53a+76a=200a=200*47=9400
б)128р-72р-28р=28р=28*11=308
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Answers & Comments
a)4a+90a=(4+90)*a=94a
б)86b-77b=(86-77)*b=9b
в)209m+m=(209+1)*m=210m
г)302n-n=(302-1)*n=301n
-----------------------------------------
a)24a+47a+53a+76a=200a=200*47=9400
б)128р-72р-28р=28р=28*11=308