A two digit number, plus nine times its one digit number, is exactly 100 A. 10B. 11C. 12D. 13

A two digit number, plus nine times its one digit number, is exactly 100 A. 10B. 11C. 12D. 13

Let ten digits be a and one digit be B, then the number is 10A + B, then 10A + B + 9b = 100, that is, 10 (a + b) = 100A + B = 10, so choose a

9 times of a number plus 12 equals 50% of 96. What's the number?

Let this number be x, & nbsp; & nbsp; 9x + 12 = 96 × 50%, & nbsp; & nbsp; 9x + 12 = 48, 9x + 12-12 = 48-12, & nbsp; & nbsp; 9x △ 9 = 36 △ 9, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 4

6×（_ -3) If the numbers in brackets are the same, how to calculate them? Can you say the basic principle and its formula in the most popular language

Let this number be X
6x-18=2x
4x=18
x=4.5

How to calculate 12-2 × () = 1.5 × () + 5? Why should it be written as: 12-2x = 1.5x + 5
How to calculate 12-2 × () = 1.5 × () + 5
12-2x=1.5x+5
3.5x=7
X = 2, can you say the basic principle and its formula in the most popular language

12 - 2 times of a number = 1.5 times of this number + 5 12 - 3.5 times of this number = 5 3.5 times of this number = 12-5 = 7 this number = 2