82=100%
100%-13%=87%
find 87% of 82
percent mean sparts ou tof 100
87%=87/100=0.87
'of' means multipy
87% of 82=
0.87 times 82=71.34
120 g of seawater. If you need the work I can send a picture
First in order to solve you need to get rid of the fraction. You can do so by multiplying to entire equation by the denominator like so...
5(5r - 1/5) = (4/5)5
25r - 1 = 4
Then to isolate the variable you need to add 1 to both sides.
25r = 5
Then you divide.
r = 5/25
Simplify.
r = 1/5
I hope this helps love! :)
Combine like terms the variables first. 4b-15b=-11b
-7+3=-4
-11b-4
