A number decreased by 9 is equal to 40. Find the number.
Let the number =x
Now, according to the question:-
x-9=40⇒x=40+9⇒x=49
Hence, the number is 49
Four times the square of a positive number decreased by 6 equals 7times the number increased by 9. Find the number.
A number is increased by 40% and then decreased by 40%. Find the net increase or decrease percent.