-1,3а + 2,09b...............
X кг - 100\%
12 кг - 16\%
(12*100):16= 75 килограмм
Var
a, b, c, d: real;
begin
write('a b c d? ');
readln(a, b, c, d);
if ((a > c) and (b > d)) or ((a > d) and (b > c)) then
writeln('да')
else
writeln('нет');
<span>end.
на языке паскаля
</span>
1)8 1/5+5 1/6-3 1/5=246+155-96/30=305/30=61/6
2) 8 1/8+1 2/3 -31/4=165+40+186/24=19/24