**Mark Scheme**

**Working**

Toby is forming and solving equations.

a)

Toby uses

*y*to represent the number.

Write an equation that Toby could form.

*There is no working for part b!*

**Question**

17)

Toby is forming and solving equations.

a)

Toby is forming and solving equations.

a)

Toby uses

*y*to represent the number.

Write an equation that Toby could form.

**[2 marks]**

b) Toby forms another equation.

He wants to work out the values of

Here is his working.

*x*.Here is his working.

What error has he made in his working?

**[1 mark]**