Anna is making crumble. She makes the crumble from flour, sugar and butter.
Anna needs twice as much butter as sugar.
She needs one and a half times as much flour as butter.
Anna is going to make 900g of crumble.
Calculate the amount of sugar Anna needs.

Create an algebraic equation.

Everything is = 900g

Create what you trying to find as: x.

Sugar = x
You have twice as much butter as sugar,so:
Butter = 2x
You have 1.5x as much flour as butter,so:
Flour = 3x

900g = x + 2x + 3x
900g = 6x

You want to find sugar (x). So divide by 6

150g = x

She needs 150g of sugar.

900g

I’m not absolutely sure but i think it’s 7x6x5x4x3x2=5040 because as the first character you can take any of the 7 given then you are left with 5 then 6 then 4 etc.