What is m∠a ?

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What is the value of x in the this question ?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

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