721,520,

721,520,

721 --- dear
520 --- I love you
1314 --- all my life

Xiaowan's mobile phone received the following message: "think of a number, add 52.8 to it, multiply by 5, subtract 3.9343, divide by 0.5, and finally subtract ten times of the number in mind. The answer is very romantic!" According to the above instructions, let the number in Xiaowan's mind be x, and find out the romantic number

According to the meaning of the title, we get 10.5 [5 (x + 52.8) - 3.943] - 10x, = 2 (5x + 264-3.943) - 10x, = 520.1314

Find the unknown X.2 + 18 / x = 1.24

If the following is 0.24, the answer is 88

Find the values of the following unknowns: (X-60) 3 = - 27; 25 (x2-1) = 24,

x-60=-9 x²-1=24/25
x=51 x²=49/25
x1=7/5,x2=-7/5