Question

Can you show the working out as well please?​

Answer 1

BC = 60

Explanation:

3X + X = 80 <---- X = BC

3X + X = 4X

4X = 80 <---- DIVIDE BOTH SIDES BY 4

4X ÷ 4 = X

80 ÷ 4 = 20

20 × 3 = 60

Answer 2

AB = 20 m

BC = 60 m

Explanation:

Let AB be x

So BC becomes 3x

AC is 80 metres

So,

x+3x = 80

4x = 80

Dividing both sides by 4

x = 20

So,

AB = 20 metres

While

BC = 3(20) = 60 metres