x-6-x-4=10-x -10=10-x -20=-x x=20 check: 20-6-20-4=10-20 -10=-10√
(5)21 x (4)11 = (5)11 x (5)10 x (4)11 = (5)10 x (5 x 4)11 = (5)10 x (20)11 =(5)10 x 20 x (20)10 = 20 x (5 x 20)10 = 20 x (100)10 = 2 x (10)1 x (10)20 =2 x (10)21 = 2,000,000,000,000,000,000,000
10 is greater than square root 20 √20 = √(2 x 10) = √2 x √10 10 = √10 x √10 √10 > √2 → 10 > √20
x % of 80 = 20 = x / 100 x 80 = 20 = 8 x / 10 = 20 = x = 20 x 10 / 8 = x = 25% (answer)
That means that you multiply 20 by itself, using it 20 times as a factor:20 x 20 x 20 x ... x 20 (a total of 20 factors). You can calculate this in Excel, writing the following formula: = 20^20
x-6-x-4=10-x -10=10-x -20=-x x=20 check: 20-6-20-4=10-20 -10=-10√
x+10=20 then you subtract 10 from both sides x=10
20 x 10 x 2 = 400
(5)21 x (4)11 = (5)11 x (5)10 x (4)11 = (5)10 x (5 x 4)11 = (5)10 x (20)11 =(5)10 x 20 x (20)10 = 20 x (5 x 20)10 = 20 x (100)10 = 2 x (10)1 x (10)20 =2 x (10)21 = 2,000,000,000,000,000,000,000
20
10 is greater than square root 20 √20 = √(2 x 10) = √2 x √10 10 = √10 x √10 √10 > √2 → 10 > √20
it means that x should equal 10. x + x = 20. x = 10
{x=-10 < x < 20,x E z
20 = 1 x 20, 2 x 10, 4 x 5, 5 x 4, 10 x 2, 20 x 1.
10. Let us assume x is the number. x * (20/100) = 2 x * 20 = 200 x = 200/20 = 10 2 is 20% of 10.
x % of 80 = 20 = x / 100 x 80 = 20 = 8 x / 10 = 20 = x = 20 x 10 / 8 = x = 25% (answer)
1 x 20, 2 x 10, 4 x 5, 5 x 4, 10 x 2, 20 x 1 = 20