(9 * 100) + (2 * 10) + (3 * 0.1) + (7 * 0.001) =
920.307
Solve by elimination ie eliminate x or y from the equations by performing operations on them.
first label the equations , to follow the process.
x - y = 5 ----------------(1)
x+ y = 3 ----------------(2)
If (1) and (2) are added then y will be eliminated.
(1) + (2) gives : 2x = 8 → x = 4
now substitute this value of x into either of the 2 equations and solve for y.
let x = 4 in (1) : 4 - y = 5 → -y = 1 → y = -1
check in (1) : 4-(-1) = 4+1 = 5
check in(2) : 4 - 1 = 3
So your answer is x = 4 , y = -1
L=-w+p/2 i found it on auto calculator
An algebraic expression would be:
720-20x
x=the number of days
Testing out the expression:
Ex: 9 days of deleting photos
720-20(9)
720-180
=540 photos left
Hope this helps!
-Benjamin
