Write two equations that have one unique solutions each?​

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. what is the resulting expression? (4x2 + 3)(x2 – 5) (4x2 – 3)(x2 – 5) (4x2 – 5)(x2 + 3) (4x2 + 5)(x2 – 3)