Hello, magentarita!

Marc Bryan is putting 1p and 5p coins in his piggy bank.

The total amount inside is 145p.

The number of 1p coins is 1 more than 3 times the number of 5p coins.

How many 1p and 5p coins are there?

Let = number of 1p coins.

Let = number of 5p coins.

We are told that: . .[1]

The total value is: . .[2]

Subtract [1] from [2]: .

Substitute into [1]: .

Answer: .