3 rabbits cost £19.70
the second rabbitt cost £2 more than the first
the third rabbitt cost 80p less than the second
what is the cost of the first rabbitt
can someone please tell me the formula
Let the rabbits be $\displaystyle U_1, U_2\ and\ U_3$ respectively
You are told $\displaystyle U_1 + U_2 + U_3 = 19.70$
$\displaystyle U_2 = U_1 + 2$
$\displaystyle U_3 = U_2 - 0.8$
Can you use substitution to find U1? (My answer and working are in the spoiler if you wish to check but remember you're only cheating yourself if you don't bother trying)
Spoiler:
I get an answer of £5.50 which follows because we'd get
£5.50 + £7.50 + £6.70 = £13+£6.70 = £19.70