Forming and Solving Equations

The side lengths of a triangle are $5 x - 4$ mm, $2 x + 1$ mm and $x + 7$ mm.

a.

Write down an expression, in terms of $x$ , for the perimeter of the triangle.

[2]

b.

The perimeter of the triangle is 52 mm. Work out the value of $x$ .

[2]

The side lengths of a triangle are $5 x - 4$ mm, $2 x + 1$ mm and $x + 7$ mm.

a.

Write down an expression, in terms of $x$ , for the perimeter of the triangle.

[2]

b.

The perimeter of the triangle is 52 mm. Work out the value of $x$ .

[2]

Forming and Solving Equations Questions