Answer:
3. £60
4. Ned had £175
Step-by-step explanation:
3. 3 segments of Donna plus £60 is the money that Kyra has. Ater Donna spend 1/3 of her money, Kyra has twice as much money as Danna. This means that 2 segments of Donna are equal to 1 segment plus £60, so 1 segment is equal to £60. Donna spend 1 segment of her money, that is, £60.
4. Let's define <em>x</em> the money of Kelly, and <em>y</em> the money of Ned.
Kelly and Ned have £400 in total:
x + y = 400 (eq. 1)
Kelly spends 40% of her money (so she conserves the other 60%), Ned spends £40, They now have the same amount of money:
0.6*y = x - 40 (eq. 2)
From equation 1:
y = 400 - x
Replacing into equation 2:
0.6*(400 - x) = x - 40
240 - 0.6*x = x - 40
- 0.6*x - x = - 40 - 240
-1.6*x = -280
x = -280/-1.6
x = £175