If the sum of three consecutive odd numbers is 51, what are the three numbers

If the sum of three consecutive odd numbers is 51, what are the three numbers

15,17,19

The sum of three consecutive odd numbers is 51. If the middle number is represented by X, please list the equation to express the quantitative relationship

The other two numbers are X-2 and X + 2
(X-2)+X+(X+2)=51
3X=51
X=17
The three numbers are 15, 17 and 19

The calculation of angle is 1.52 ° 45 ′ - 32 ° 46 ′ 2.26 ° 18 ′ 52 ′ × 63.43 ° 13 ′ 27 ′ △ 7, which is best listed or explained,

Angle is 60 base. Angle operation is similar to decimal number operation. Every 60 seconds into 1 minute, every 60 minutes into 1 degree, can be compared with daily clocks and watches