T = 0
isolate the variable
After 5 months you will have $160
so,
10
10×2 =20
20×2=40
40×2 =80
80×2=160
hence proved that after 5 months you will have $160
Answer:
1. Use the distributive property to get rid of any parenthesis.
2. Combine like terms
3. Move all variables to one side
4. Inverse operations
Eliminate p :
2 (m + 2n + 2p) + (-1) (3m - n + 4p) = 2 (4) + (-1) 25
2m + 4n + 4p - 3m + n - 4p = 8 - 25
-m + 5n = -17
(m + 2n + 2p) + 2 (3m + 2n - p) = 4 + 2 (-4)
m + 2n + 2p + 6m + 4n - 2p = 4 - 8
7m + 6n = -4
Eliminate m :
7 (-m + 5n) + (7m + 6n) = 7 (-17) + (-4)
-7m + 35n + 7m + 6n = -119 - 4
41n = -123
Solve for n :
n = -3
Solve for m :
-m + 5 (-3) = -17
-m - 15 = -17
m = 2
Solve for p :
2 + 2 (-3) + 2p = 4
2 - 6 + 2p = 4
2p = 8
p = 4
