Substitution word problem
I realise I posted this in the wrong forum sorry:(
this is grade 10
the problem is:
a silversmith has alloys that contain 40% silver and others that have 50% silver. A custom order requires 150g of 44% silver. How much of each alloy should be melted together to make the bracelet?
so far i got:
Let x represent the 40% alloy
Let y represent the 50% alloy.
I rearranged the first eqaution to be y=-x+150.
Then subbed it into the second to be 0.4x+0.5(-x+150)=0.44
but when I solved this, i got 745.6. Where did I go wrong?