Question

I have 25 coins, x of them are R5 coins and the rest are R2 coins. An expression in term in terms of x for

the number of R2 coins I have is. . .

Answer 1

There are 2 sets of coins R5 and R2. The number of coins should add up to 25.

x+yR2=25

yR2=25-x

The number of R2 coins I have is 25-x