How to solve the equation (x + 1) x = 600 Open any page of a book, but the product of the number of pages on this page and the number of adjacent pages is 600,

How to solve the equation (x + 1) x = 600 Open any page of a book, but the product of the number of pages on this page and the number of adjacent pages is 600,

Decompose 600 = 2 * 2 * 2 * 3 * 5 * 5 by short division
That is, 600 = 24 * 25

How to solve the equation x △ 500 = x △ 600 + (8 + 5)

x÷500=x÷600+（8+5）
x/500-x/600=13
x/3000=13
x=39000

How to solve this equation: (x / 2-600) / 96 = (x / 2 + 600) / 240

(x / 2-600) / 96 = (x / 2 + 600) / 240 multiply by 480 at the same time
5(x/2-600)=2(x/2+600)
5x/2-3000=x+1200
5x/2-x=1200+3000
3/2x=4200
x=4200*2/3
x=2800

30% of a number is 80% of 15. What is the number? (solution of the equation)

15*80%÷30%=40