What is the solution to this system of equations

How many $20 bills do you need to have to make $280

Which letters from the table represent like terms? a and b b and c a and d b and d

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total