Help me please, Mathematics.

Graph red beads cost $1 an ounce and gold beads cost $3 an ounce. juanita wants to purchase a 12-ounce mixture of red and gold beads that she can sell for $2 an ounce. the solution of the system shows the number of beads needed for juanita to break even. x + y = 12, x + 3y = 24 how many ounces of red beads will juanita buy to break even? how many ounces of gold beads will she buy?

For each proportion find the unknown number x 1/5/8=×/15

Caitlin had 402. in her bank account. she withdrew $15.each week to pay for swimming lesson. she now has $237.