4n-7=-3n
add 3n to both sides
and then solve for n
n=1
The answer would be 272 because youre trying to find the decrease which is
340x.20 because you always move the percent over two decimals. you would get 68 after multiplying it then u would subtract that number by 340.
Do you have a photo, what tells us that the unknown number is multiplied by 3?
