Исправить здесь ошибки program lr28; var a,x,z,b,c: integer; d: real; begin writeln(' № equation'); readln(a); writeln('variables'); readln(x,z,a,b,c); case a of d: ((x-z)/(x+z)); writeln(d): d: = -b/(2*a); writeln(d): d: = ((a*a*a)/abs(x-z)); writeln(d): d: (sqrt(abs(b*b-4*a*; writeln(d): else writeln('error'); end; end.

Program lr28;
var k,a,b,c,x,z: integer;
d:real;
begin
write('№ equation: ');
readln(k);
writeln('variables:');
readln(x,z,a,b,c);
case k of 
1: begin d:=(x-z)/(x+z); writeln(d); end;
2: begin d:=-b/(2*a); writeln(d); end;
3: begin d:=(a*a*a)/abs(x-z); writeln(d); end;
4: begin d:=sqrt(abs(b*b-4*a*c)); writeln(d); end;
else writeln('error');
end;
end.