W+d=869
w=d-81
plug in
(d-81)+d=869
2d-81=869
+81 both sides
2d=950
÷2 both sides
d=475
dryer cost $475
let's check w=475-81
w=394
475+394=869
869=869
the solution is true :)
True i think i go with what my gut says
0.8g=12
g=12/0.8
Where 0.8 is 80% in fraction form (80/100), g is the number of games played and 12 is the games won.
0.8g=12
----- ---
0.8 0.8
g=15
g=12/0.8
g=15
They played a total of 15 games.
Check:
<span>0.8(15)
=12</span>
The first digit is the largest of the 3, 9 is > 4 and 3
The 2nd is NOT the smallest 4>3
The third digit is NOT even (3 is an odd number)
The first digit IS ODD (9 is an odd number)
todd = 8 + 9
sally = 18 + 7
Just keep adding until they have the same amount if they ever do.
todd 17 26 35 44 53
sally 25 32 39 46 53
so it took them 5 mouths and they both have 53 CD's
