Suppose Alex has 3x stamps, Freddy has 5x stamps. After Freddy gives Alex 10 stamps, Alex has 3x+10 while Freddy has 5x-10
the new ratio is 7 to 9, so we have the equation: (3x+10)/(5x-10)=7/9
9(3x+10)=7(5x-10)
27x+90=35x-70
160=8x
x=20
So Alex has 3*20=60 stamps while Freddy has 5*20=100. Together they have 160
81-1= 80
80 / 2 = 40
D = 40
So:
40(2) = 81 - 1
Answer:
=6
Step-by-step explanation:
find the LCM of the two denominators 3 and 6 which is 6
equate in that such that 6÷3*2x=4x
6÷6×x=x
add the two=5x
5x/6=5
multiply by six both sides
5x=30
divide both sides by 5 to get x
x=6
hope it helps
-3 times -3=9
9-(-3)=9+3
9+3=12
Hope this helps and please give brainliest!