Please help i really need to know how to solve 11 and 12. were solving each equation for y in terms of x

Last saturday, the museum box office sold 281 tickets for a total of $3,954. adults ticket cost $15, and students ticket cost $12. how many of each kind of tickets were sold?

Choose the number sentence that shows the identity property of addition. a. 122 = 61 + 61 b. 62 = 1 + 61 c. 61 = 0 + 61

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps