Help ASAP!!! I can’t figure it out!!!

Question

Determine the amounts of 25% and 40% salt solutions that should be mixed to obtain 400 gallons of 34% salt solution.

Answer 1

Let x = 25% solution amount

Let y = 40% solution amount

The 2 equations are

Since you know there are 400 gallons total:

x+y=400

You can also make an equation based on the % of salt in the solutions:

0.25x+0.40y=0.34(400)

Can you solve this by substitution or elimination now that you have the equations?