Remember you can do anything to an equation as long as you do it to both sides
x+9=18-2x
add 2x to both sides
2x+x+9=18+2x-2x
3x+9=18+0
3x+9=18
minus 9 both sides
3x+9-9=18-9
3x+0=9
3x=9
divide both sides by 3
(3x)/3=9/3
(3/3)x=3
1x=3
x=3
9!/(8!*(9-8)!)=9
or just use a calculator and use the nCr function
The next value would be 48. The values keep increasing by odd numbers. Like the first one is 3 then it goes to 5.
3, 5, 7, 9, 11, 13.....
Answer:
x=30
Step-by-step explanation:
that's a 90º angle so 90÷3=30
