Which is a subset of {1, 2, 4, 5, 6}?

{0, 1, 2}
{3, 4}
{5, 6, 7}
{2, 6}

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

How to write four times a number, minus 6,is equal to theee times the number+8 as an equqtion

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)