If the sum of two numbers is 15, the difference between them is equal to 3. Let a number be x, the equation can be obtained___ ?

If the sum of two numbers is 15, the difference between them is equal to 3. Let a number be x, the equation can be obtained___ ?

x+（3+X)=15 3+2X=15

The sum of 5.4 and 4.1 / 3 equals 15 minus a number. What is the number? (solve the equation)

Let this number be X
Then 5.4 + 4 + 1 / 3 = 15-x
x=15-5.4-4-1/3
X = 5 and 4 / 15

In mathematics class, Mr. Bao said that numbers and Chinese characters have the same aesthetic feeling. He used the four words "I love mathematics" to list three equations for his classmates (among them, "I love mathematics")
"Love", "number" and "learning" respectively represent one of the ten numbers 0-9: (1) I love + number + Learning = 10; (2) I * love - number + Learning = 10; (3) I / love + number + Learning = 10?

I = 4
Love = 2
Number = 3
Learning = 5
I * love * Number * study = 4 * 2 * 3 * 5 = 120

Who knows what numbers the following Chinese characters stand for
Love = () good = () number = () learning ()
X learning numbers
——————
Learn 0
——————
Good love

Love 3 good 1 number 2 learn 5