I need some help please...

Write the sentence as an equation. 6 fewer than the quantity 140 times j equals 104

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?

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x