问题
填空题
如果X+15=40,那么X+X=______,X×X=______.
答案
x+15=40,
x+15-15=40-15,
x=25;
x+x=25+25=50,
x×x=25×25=625;
故答案为:50,625.
如果X+15=40,那么X+X=______,X×X=______.
x+15=40,
x+15-15=40-15,
x=25;
x+x=25+25=50,
x×x=25×25=625;
故答案为:50,625.