It is an algebraic expression involving x.
Of do you mean 'what is x if 2x - 9 equals 9?'
2x - 9 = 9
⇒ 2x - 9 + 9 = 9 + 9
⇒ 2x = 18
⇒ 2x ÷ 2 = 18 ÷ 2
⇒ x = 9
2/3 x 9/10 = (2x9)/(3x10) = 18/30 = 18÷6/30÷6 = 3/5
9
Oh, what a happy little question! When you have an array for 2 times 9, you can see 2 rows of 9, which equals 18. And when you have an array for 5 times 9, you can see 5 rows of 9, which equals 45. Keep exploring those arrays and you'll create a beautiful landscape of multiplication facts!
9
RT = 6 All you have to do is 15-9.
There are no prime factors in that equation.
2/3 x 9/10 = (2x9)/(3x10) = 18/30 = 18÷6/30÷6 = 3/5
5x7 - 2x9 + 5x or written properly, -2x9 + 5x7 + 5x
9
5x-2x=9
2x9=18
(2x9)/8=18/8=9/4
2x9=18 so x-7 is 9, x is 16
2x9 =18 square units
The multiplication fact (singular, not plural 'facts') that can be found is 7x9 = 63. Using the arrays, a 2x9 array (2 rows of 9 items) and 5x9 array (5 rows of 9 items) is 63: 2x9 = 18 5x9 = 45 18 + 45 = 63
two 1 / 9 x 9 = 1x9 / 9 = 9 / 9 = 1 / 1 = 1 2 / 9 x 9 = 2x9 / 9 = 18 / 9 = 2 / 1 = 2
3x6, 2x9, 1x18, -1x-18, -2x-9, -3x-6,